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Summit Racing™ Chevy LS 5.3L 450HP Long Block Crate Engines

Looking for big LS engine power at an affordable price? Summit Racing™ remanufactured 5.3L LS long block crate engines are rated at 450 HP and 420 lbs.-ft. torque! This engine will give you the performance and drivability you have been searching for at a price you can afford. It can be a performance upgrade for 99-07 Chevy trucks, or an engine swap into your project vehicle. You will save time and money by leaving the machine-work and assembly to us. Just bolt on your accessories and drop it in. These engines are machined and assembled for us by the guys at ATK, and backed with a 2-year unlimited mile warranty for peace of mind. Technical specifications: * Horsepower: 450+ * Torque: 420+ * Block: Seasoned OE LM7/5.3L iron * Bore/stroke: 3.800-3.820 in. x 3.622 in. * Year range: 1999-2007 * Displacement: 323 C.I.D. * Crankshaft: OEM GM 3.622 in. stroke internally balanced 24-tooth reluctor wheel * Connecting Rods: OE GM forged powder metal 6.093 in. * Pistons: Hypereutectic flat top * Piston rings: Moly * Compression ratio: 10:1 compression * Camshaft: Summit Racing Pro LS Hyd Roller #8713 * Camshaft specifications: Lift- 545/545, Duration @.050- 222/232 * Camshaft bearings: Installed and clocked to OEM position * Cylinder heads: #799 or #243 OE aluminum 64cc 2.00 in./1.55 in. valves * Freeze plugs: Brass installed and sealed * Rocker arms: OE powdered metal 1.7 ratio * Oil Galley plugs: Installed and sealed

4.32 out of 5 stars ( 47 )

$3,849.99

BluePrint Engines Ford 347 C.I.D. 415 HP Base Stroker Long Block Crate Engines

Satisfy your craving for horsepower with BluePrint 347 c.i.d. 415 hp base stroker long block crate engines. They are meticulously-built Blue Oval engines from a solid, reputable company that does the job right and stands behind their work. BluePrint custom-built crate and stroker performance engines are always balanced and dyno-tested to add a lot of muscle to your fun! Plus, they're shipped with the dyno results so you can see the BluePrint difference! So, where will you get your horsepower from? Block: * Square and parallel decked * Align-honed main bearing bore * Cylinders honed on computer-controlled machine to within .0002 in. straightness and roundness * Cylinders are sonic tested for thickness Rotating assembly: * New cast crankshaft * New rods with 150,000 psi bolts * Forged pistons * Moly rings * Balanced rotating assembly * High-volume oil pump * Hydraulic roller camshaft * Heavy-duty, double-roller timing set Cylinder heads: * Aluminum heads * Swirl-polished intake and exhaust valves * Hardened pushrods Plus: * 10 to 1 compression * Valve covers * Painted oil pan * Brass freeze plugs

3.0 out of 5 stars ( 6 )

$7,499.00

BluePrint Engines Chrysler 408 C.I.D. 465 HP Long Block Crate Engines

BluePrint Engines Chrysler 408 c.i.d. 465 hp crate engines sound and run better. BluePrint Engines use an advanced computerized balancer to get their rotating assemblies within 2 grams, ensuring silky smooth power over the entire rpm range. They also include a comprehensive, dyno-generated printout showing the critical specs. No more guessing what your installed engine's real-world peak horsepower and torque ratings are. Any doubters in the crowd? Simply flash them your Blueprint Engines' 408 c.i.d. stroker crate engine dyno results! Features, items, and specs: * Available in 3 levels of dress: Long block base, fully dressed, and drop-in-ready * Long block base model includes oil pan, timing cover, and valve covers * Fully dressed model includes long block components, plus carburetor, intake manifold, distributor, and harmonic balancer installed * Drop-in-ready model includes fully dressed components, plus water pump, air cleaner, spark plugs, and spark plug wires * Aluminum cylinder heads: 58cc chamber; 2.02 in. intake/1.60 in. exhaust valves; 176cc intake/75cc exhaust runners * Roller cam: .544 intake; .541 exhaust; 236 intake/242 exhaust duration at .050--110 degree lobe separation * Cast steel crankshaft: 4.000 in stroke; OEM-type 6.123 in. connecting rods with 150,000 psi bolts; forged pistons; external balance * Hand-picked, seasoned block: Square and parallel decked with precision-machined and sonic-tested cylinders, 2-bolt main, 4.000 in bored and .040 in. over, 2-piece rear main seal, and mechanical pump provision * 34 degrees total at 4,000 rpm ignition timing * Brass freeze plugs * Recommended fuel: 91 octane

5.0 out of 5 stars ( 1 )

$8,899.00

$9,999.00

ATK High Performance GM 383 Stroker 415 HP Stage 1 Long Block Crate Engines

Give your ride the extra twist only a stroker can deliver with ATK High-Performance GM 383 Stroker 415 hp Stage 1 long block crate engines. These engines feature quality components and professional assembly to give your car or truck the kick it needs. They produce up to 460 ft.-lbs. of torque—that's enough to get you rolling in a cloud of tire smoke! ATK GM 383 Stroker 415 hp Stage 1 long block crate engine specs: * Seasoned OE 4-bolt main roller block * 4.040 x 3.750 bore/stroke * 383 c.i.d. displacement * Scat nodular iron crankshaft (3.750 in. stroke; one-piece; externally balanced rear/internal front) * Scat 4340 forged I-beam connecting rods (5.700 in.) with ARP bolts * Hypereutectic pistons * Moly piston rings with 9.7:1 compression ratio * Hydraulic roller camshaft with 220/224 duration at 0.050, 0.528 in./0.536 ex. lift, 112LSA * Installed camshaft bearings clocked to OEM position * ATK high-performance aluminum cylinder heads with 2.02/1.60 ex. valves * Installed and sealed brass freeze plugs (oil galley plugs also installed and sealed) * Billet aluminum 1.6 ratio rocker arms * 5 qt. OE oil pan * 350 lbs.

4.8 out of 5 stars ( 5 )

$4,498.99

ATK High Performance Ford 302 Stock Drop-In Long Block Crate Engines

Classic Ford 302 stock drop-in long block crate engines from ATK High Performance are shipped to you fully dressed. These are basic stock engines with moderate horsepower and torque based off the 80-86 Ford 302 engine. These engines typically make about 240 horsepower on the dynamometer. Additional specs: * Block: seasoned OE roller block * Bore/Stroke: up to 4.060 x 3.000 * Displacement: 302 c.i.d. * Crankshaft: OE Ford cast late model crankshaft (50 oz. imbalance) * OE steel connecting rods 5.4 in. stock bolts * Pistons: hypereutectic * Piston rings: moly rings * Compression Ratio: 8.5:1 * Camshaft: hydraulic flat tappet * Camshaft specifications: OE stock * Camshaft bearings installed and blocked to OEM position * Cylinder heads: OE cast iron * Freeze plugs: brass installed and sealed * Rocker arms: stamped steel 1.5 ratio * Oil galley plugs: installed and sealed * Oil pan: OE 5 qt. front sump * Weight: 430 lbs. * For engine break-in please follow the ATK break-in procedure that is included with the engine.

3.94 out of 5 stars ( 32 )

$3,998.99

BluePrint Engines GM 496 C.I.D. 600 HP Stroker Dressed Long Block Crate Engines

BluePrint Engines GM 496 c.i.d. 600 hp stroker dressed long block crate engines with aluminum heads provide reliable high-end performance. They are manufactured under strict tolerances and provide outstanding, consistent results. BluePrint Engines GM 496 c.i.d. stroker dressed crate engines are dyno-tested and the results are shipped with engine . Block: * Hand-picked seasoned Chevy 454 big block * Square and parallel decked * Align-honed main bearing bore * Cylinders honed to within .0002 straightness and roundness * Cylinders are sonic-tested for thickness Rotating assembly: * Forged steel crankshaft * OEM-type connecting rods with 150,000 psi rod bolts * Hypereutectic pistons * Hydraulic roller camshaft Additional features: * Aluminum cylinder heads * Valve covers, oil pan, and timing cover * Brass freeze plugs * 30-month/50,000-mile warranty

4.5 out of 5 stars ( 2 )

$10,199.00

BluePrint Engines GM 383 C.I.D. 436 HP Fully Dressed Stroker Long Block Crate Engines

Bolt some serious power into your ride with these BluePrint Engines GM 383 c.i.d. 436 hp dressed stroker long block crate engines. These engines are built from the ground up to provide a reliable 436 hp and 443 lbs.-ft. of torque to power your street rod, muscle car or any other project that needs serious power. Each engine is hand-assembled, and precision balanced to ensure it will run smooth and strong for years to come. BluePrint GM 383 c.i.d. 436 hp dressed stroker crate engines include: * 4-bolt main block * New cast crankshaft * Hypereutectic pistons * Chevy heavy beam rods with 150,000 psi bolts * Moly rings * Balanced rotating assembly * Melling high-volume oil pump * Hydraulic Roller lifter camshaft * Heavy-duty double roller timing set * Aluminum cylinder heads * Hardened retainers and springs * Swirl polished intake and exhaust valves * Hardened pushrods * Dual plane satin finish intake manifold * Carburetion * Distributor, plug wires and plugs * Water pump * New valve covers * Brass freeze plugs * Front accessory drive with water pump, A/C compressor, alternator, and power steering pump * Dyno tested—and shipped with results

1.0 out of 5 stars ( 1 )

$8,299.00

$10,299.00

ATK High Performance Chevy LQ9 6.0L Short Blocks

ATK High Performance Chevy LQ9 6.0L short blocks with OE flat top pistons are great beginnings for your mild street build, or just as a replacement for a tired short block. ATK takes the hard work out of your project by selling blocks that are ready to complete yourself. Every great build needs a solid foundation. Start yours with one of ATK's Chevy LQ9 6.0L short blocks. Technical specifications: * Block: Seasoned 6.0L cast no. 364 or 184 * Bore/stroke: 4.030 x 3.622 * Year range: 2001-2007 * Displacement: 370 c.i.d. * Crankshaft: OEM GM 3.622 in. stroke internally balanced 24-tooth reluctor wheel * Connecting rods: OE GM forged powder metal 6.093 in. stock bolts * Pistons: OE hypereutectic flat top with no valve reliefs * Piston rings: Moly rings * Compression ratio: 64cc = 10.7:1, 68cc = 10.2:1, 72cc = 9.8:1 * Camshaft bearings: Installed and clocked to OEM position * Freeze plugs: Brass installed and sealed * Oil galley plugs: Installed and sealed * Weight: 285 lbs.

4.29 out of 5 stars ( 7 )

$3,198.99

ATK High Performance Ford 347 Stroker 450 HP Stage 3 Long Block Crate Engines

If you don't have the time or means for a build, ATK High Performance Ford 347 Stroker Stage 3 long block crate engines are the answer. They'll help anyone looking for a complete motor with reliable, on-street high performance. These fully-dressed (Stage 3) engines work with power accessories, produce a noticeable idle, and include all the Stage 2 components. They may also add in the following parts (among others): carburetion, filters, and spark system. ATK Ford 347 Stroker 450 hp Stage 3 long block crate engines specs: * 440 lbs.-ft. torque * Seasoned OE roller block * 4.040 x 3.400 bore/stroke * 347 c.i.d. displacement * Nodular iron crankshaft (3.400 in. stroke; one-piece externally balanced; 28 oz.) * 4340 forged I-beam connecting rods (5.400) with ARP bolts * Forged flat-top pistons with four valve reliefs * Moly piston rings with 10.1:1 compression ratio * Hydraulic roller camshaft with 231/235 duration at 0.050, 0.544 in./0.565 ex. Lift, 112LSA * Installed camshaft bearings clocked to OEM position * Dart Pro 1 aluminum cylinder heads with 58cc/195cc port volume and 2.02/1.60 in. valves * Installed and sealed brass freeze plugs (oil galley plugs also installed and sealed) * Billet aluminum 1.6 ratio full roller rocker arms * 5 qt. front sump OE oil pan * 430 lbs.

3.0 out of 5 stars ( 2 )

$8,099.99

ATK Marine Rebuilt Long Block Engines

ATK Marine Engines offers premium-quality rebuilt long block engines specifically for boating applications. These engines are designed to deliver maximum performance and long-term durability for your boat. Order the model recommended for your marine application. ATK Marine rebuilt engines include: * Special marine pistons and rings * Special marine camshaft * Marine gaskets * New intake and exhaust valves * New main, rod, and cam bearings * New valve lifters, rocker nuts, and swivels * Heavy-duty double roller timing chains * Cam sprocket * Crank gear * Freeze plugs

4.4 out of 5 stars ( 45 )

$1,872.50

$5,542.99

ATK High Performance GM 383 Stroker 435 HP Stage 1 Long Block Crate Engines

Give your ride the extra twist only a stroker can deliver with ATK High-Performance GM 383 Stroker 435 hp Stage 1 long block crate engines. These engines feature quality components and professional assembly to give your car or truck the kick it needs. They produce up to 475 ft.-lbs. of torque—that's enough to get you rolling in a cloud of tire smoke! ATK GM 383 Stroker 435 hp Stage 1 long block crate engine specs: * Seasoned OE 4-bolt main roller block * 4.040 x 3.750 bore/stroke * 383 c.i.d. displacement * Scat nodular iron crankshaft (3.750 in. stroke; one-piece; externally balanced rear/internal front) * Scat 4340 forged I-beam connecting rods (5.700 in.) with ARP bolts * Forged flat-top pistons with two valve reliefs * Moly piston rings with 10.1:1 compression ratio * Hydraulic roller camshaft with 220/224 duration at 0.050, 0.528 in./0.536 ex. Lift, 112LSA * Installed camshaft bearings clocked to OEM position * Dart SHP aluminum cylinder heads with 72cc/180cc port volume and 2.02/1.60 in. valves * Installed and sealed brass freeze plugs (oil galley plugs also installed and sealed) * Billet aluminum 1.6 ratio full roller rocker arms * 5 qt. OE oil pan * 350 lbs.

Not Yet Reviewed

$4,998.99

ATK High Performance Chevy LM7 5.3L 385 HP Long BLock Crate Engines

With ATK High Performance Chevy LM7 5.3L 385 hp long block crate engines expect big mid to upper end power and a noticeable idle. They were designed to be performance upgrades for a 1999-2007 Chevy truck LM7 or an LS swap in a hot rod. Technical specifications include: * Horsepower: 385+ * Torque: 390+ * Block: GM 5.3L iron LM7 * Bore/stroke: Up to 3.809 x 3.622 * Year range: 1999-2007 * Displacement: 323 c.i.d. * Crankshaft: OEM GM 3.622 in. stroke internally balanced 24 tooth reluctor wheel .857 in. flange * Connecting rods: OE GM forged powder metal 6.093 in. stock bolts * Pistons: Hypereutectic dish * Piston rings: Moly rings * Compression ratio: 9.5:1 compression * Camshaft: Hydraulic roller * Camshaft specifications: Custom grind * Camshaft bearings: Installed and clocked to OEM position * Cylinder heads: OE aluminum 61.15cc 1.89/1.55 * Freeze plugs: Brass installed and sealed * Rocker arms: OE powdered metal 1.7 ratio * Oil Galley plugs: Installed and sealed * Weight: 385

4.93 out of 5 stars ( 15 )

$4,189.99

ATK High Performance Chevy LM7 5.3L Short Blocks

ATK High Performance Chevy LM7 5.3L short blocks are assembled with OE flat top pistons and offer these engine specifications: * Seasoned 5.3L LM7 block * 1999-2007 year range * Bore/stroke: 3.810 in. x 3.622 in. * Displacement: 330 cu.in * OEM GM 24-tooth reluctor wheel crankshaft * OEM GM forged powder metal rods * Stock hypereutectic flat top pistons with two valve reliefs * Compression ratios: 61cc = 9.8:1/64cc = 9.5:1/68cc = 9.1:1 -- Can vary due to deck height/gasket thickness * Plasma moly rings * Camshaft bearings: Installed and clocked to OEM position * Freeze plugs: Installed and sealed * Oil galley plugs: Installed and sealed

Not Yet Reviewed

$2,043.99

BluePrint Engines GM 383 C.I.D. Stroker Short Block Plus Engines

BluePrint Engines GM 383 c.i.d. short block plus stroker engines are always balanced and ready for you to finish assemble. Whether you're building a kit car, race car, hot rod, or just a sweet old memory, BluePrint Engines are ready to add a lot of muscle to your fun! Block details: * 4-bolt main * Passenger side dipstick * Cylinder wall thickness "sonic-tested" * Cylinders computer-honed to tolerance of .0002 in. Rotating assembly details: * Crankshaft * Pistons * Connecting rods * Moly rings * High-volume oil pump * Heavy-duty single roller timing set * Harmonic balancer * Hydraulic roller camshaft and lifters * Oil pan * Brass freeze plugs

4.56 out of 5 stars ( 9 )

$5,999.00

ATK High Performance Chrysler 360 Magnum 320 HP Stage 3 Long Block Crate Engines

Street cruisers really can't ask for more than they'll find in ATK high performance Chrysler 360 320 hp Stage 3 long block crate engines. They're packed with the finest, well-matched components, so you can drop the engine into your project and fire it up. ATK has outfitted the blocks as completely as possible to save you time and headaches. These complete Stage 3 long blocks typically include carburetion, spark plug wires, and plugs. ATK Chrysler 360 engines include: * Seasoned OE Magnum block * OE-cast crankshaft * OE steel connecting rods * Hypereutectic pistons * Piston rings * Hydraulic roller camshaft * Magnum 65cc cylinder heads * Steel rocker arms 1.6 pedestal * Brass freeze plugs installed and sealed * Oil galley plugs installed and sealed

3.5 out of 5 stars ( 2 )

$5,798.99

ATK High Performance Chrysler 408 Stroker Magnum 465 HP Stage 3 Long Block Crate Engines

ATK High Performance Chrysler 408 Magnum 465 hp Stage 3 long block crate engines are a great way to upgrade your old Mopar-equipped vehicle. These Magnum-based 408 c.i.d strokers have a lopey idle and great low/mid-range power, just perfect for a muscle car or truck. The technical specs for ATK Chrysler 408 Magnum Stage 3 crate engines are: * Horsepower: 465 hp * Torque: 535 ft.-lbs. * Block: seasoned OE 1993-2001 Magnum block * Bore/stroke: 4.040 x 4.000 * Displacement: 408 c.i.d. * Crankshaft: nodular iron 4.000 in. stroke internally balanced * Connecting Rods: 4340 forged I-beam with ARP 8740 Bolts * Pistons: forged * Piston rings: moly rings * Compression ratio: 10.1:1 compression * Camshaft: Hydraulic roller * Camshaft specifications: 229/233 @.050 in., .520 intake/.515 exhaust * Camshaft bearings: installed and clocked to OEM position * Cylinder heads: Edelbrock Performer RPM aluminum 58cc/176cc 2.02/1.60 * Freeze plugs: brass installed and sealed * Rocker arms: billet aluminum 1.6 full roller * Oil galley plugs: installed and sealed * Oil pan: OE 5 qt. center sump * Weight: 430 lbs.

5.0 out of 5 stars ( 2 )

$9,882.99

ATK High Performance Ford 347 Stroker 450 HP Stage 2 Long Block Crate Engines

Start your build with ATK High Performance Ford 347 Stroker Stage 2 long block crate engines. They'll help anyone looking to complete their build with reliable, on-street high performance. These mid-dressed (Stage 2) engines work with power accessories, produce a noticeable idle, and may include (among other parts) an intake manifold, distributor, water pump, front damper, and flexplate. ATK Ford 347 Stroker 450 hp Stage 2 long block crate engines specs: * 440 lbs.-ft. torque * Seasoned OE roller block * 4.040 x 3.400 bore/stroke * 347 c.i.d. displacement * Nodular iron crankshaft (3.400 in. stroke; one-piece externally balanced; 28 oz.) * 4340 forged I-beam connecting rods (5.400) with ARP bolts * Forged flat-top pistons with four valve reliefs * Moly piston rings with 10.1:1 compression ratio * Hydraulic roller camshaft with 231/235 duration at 0.050, 0.544 in./0.565 ex. Lift, 112LSA * Installed camshaft bearings clocked to OEM position * Dart Pro 1 aluminum cylinder heads with 58cc/195cc port volume and 2.02/1.60 in. valves * Installed and sealed brass freeze plugs (oil galley plugs also installed and sealed) * Billet aluminum 1.6 ratio full roller rocker arms * 5 qt. front sump OE oil pan * 375 lbs.

Not Yet Reviewed

$7,364.99

ATK High Performance Chevy LM7 5.3L GEN IV Short Blocks

ATK High Performance Chevy LM7 5.3L Gen IV short blocks are assembled with OE flat top pistons and offer these engine specifications: * Seasoned 5.3L LM7 Gen IV block * 1999-2007 year range * Bore/stroke: 3.810 in. x 3.622 in. * Displacement: 330 cu.in * OEM GM 58-tooth reluctor wheel crankshaft * OEM GM forged powder metal rods * Stock hypereutectic flat top pistons with two valve reliefs * Compression ratios: 61cc = 9.8:1/64cc = 9.5:1/68cc = 9.1:1 -- Can vary due to deck height/gasket thickness * Plasma moly rings * Camshaft bearings: Installed and clocked to OEM position * Freeze plugs: Installed and sealed * Oil galley plugs: Installed and sealed

Not Yet Reviewed

$2,206.99

ATK High Performance Chevy Gen V LT1 376 Short Blocks

ATK High Performance Chevy Gen V LT1 376 short blocks are built for naturally aspirated engines, boost or nitrous. ATK starts with a new GM LT block and outfits it with a Manley 4340 forged crankshaft, H-beam rods with ARP2000 bolts, Manley 2618 forged pistons and Total Seal CS AP ring package with steel top rings. These short blocks will have the factory piston squirters installed. Engine Specifications: * Block: New GM LT1/LT4 * Bore/Stroke: 4.065 in. x 3.622 in. * Displacement (cu.in): 376 c.i.d. * Crankshaft: Manley 4340 forged 58-tooth reluctor wheel * Rods: Manley 4340 forged H-beam 6.125 in. ARP 2000 bolts * Pistons: Choice of 2618 forged +12cc dished or -2cc domed * Rings: Total Seal CS AP steel top ring with Napier 2nd ring set * Camshaft bearings: Installed and clocked to OEM position * Freeze plugs: Installed and sealed * Oil galley plugs: Installed and sealed Recommended Components: * Balancer -- Internal balance * Flex plate / Flywheel -- Internal balance * Head gasket: .051 in. or per application * Oil pump: Factory Engine Info: * Oil: 5W30 non-synthetic for first 3,000 miles * Oil filter: Wix or K&N, per application

Not Yet Reviewed

$6,998.99

ATK High Performance GM 383 Stage 1 Marine Long Block Crate Engines

Replace the tired small block in your boat with ATK High Performance GM 383 Stage 1 marine long block crate engines. They are built from the ground up with off-shore performance in mind. These hand-built and balanced engines utilize Vortec power and stroker torque to produce an awesome 345 hp and 445 ft.-lbs. of twist that will get you moving on the open water. Each engine features brass freeze plugs and corrosion-resistant marine gaskets to keep the engines healthy and reliable. ATK GM 383 Stage 1 Marine long block crate engines include: * Handpicked, remanufactured blocks * Dart Iron Vortec cylinder heads * Nodular steel crankshaft and 4340 I-beam connecting rods * Hypereutectic pistons * Hydraulic roller camshaft * Valve covers * Timing cover and timing set * Oil pan, pump, and pickup tube

5.0 out of 5 stars ( 5 )

$4,417.99

ATK High Performance Chevy LM7 383 Short Blocks

ATK Chevy LM7 383 short blocks support your build with a solid foundation. Produced for the 1999-2007 trucks, LM7 engines are very popular engines to swap into musclecars and other LS swap vehicles. ATK High Performance Chevy LM7 383 short blocks are built for naturally aspirated engines up to 700 hp. Your ATK LM7 engine may include these components for optimal performance: * Block: GM LM7 5.3L * Bore/stroke: 3.903 x 4.000 * Displacement: 383 cu. in. * Crankshaft: K1 4340 forged steel, internally balanced 24-tooth * Connecting rods: Scat Premium Pro 4340 forged I-beam with ARP 8740 bolts * Pistons: Wiseco 2618 forged aluminum with coated skirts * Piston rings: Wiseco GFX (alloy steel top ring) * Camshaft bearings: Installed and clocked to OEM position * Freeze plugs: Brass installed and sealed * Oil galley plugs: installed and sealed * Weight: 285 lbs.

Not Yet Reviewed

$4,098.99

ATK High Performance Dart Ford 427 C.I.D. Short Blocks

ATK High Performance Dart Ford 427 c.i.d. short blocks are assembled with forged 26cc dished pistons and offer these engine specifications: * Block: Dart SHP 351W SBF -- 4-bolt -- One-piece seal -- 9.500 in. deck * Bore/stroke: 4.125 in. x 4.000 in. * Displacement: 427 cu. in. * Crankshaft: Scat 4340 forged internally balanced * Rods: Scat 4340 H-beam with ARP 8740 bolts * Pistons: 2618 forged, 26cc dished * Compression ratios: 58cc = 10.4:1/64cc = 9.8:1/70cc = 9.3:1 -- Can vary due to deck height/gasket thickness * Plasma moly rings * Camshaft bearings: Installed and clocked to OEM position * Freeze plugs: Installed and sealed * Oil galley plugs: Installed and sealed

Not Yet Reviewed

$7,800.99

ATK High Performance Chevy LS 364 Short Blocks

ATK High Performance Chevy LS 364 short blocks are 100 percent GM Gen IV blocks. They are built for all motor builds with higher compression, but with the option of running pump gas they will hold up to 700 hp. ATK takes the hard work out of your project by selling blocks that are ready to complete yourself. Every great build needs a solid foundation. Start yours with one of ATK's Chevy LS 364 short blocks. Technical specifications: * For naturally aspirated engines * Block: GM 6.0L iron Gen IV * Bore/stroke: 4.000 x 3.622 * Displacement: 364 c.i.d. * Crankshaft: OE reground 3.622 in. internally balanced 24 tooth * Connecting rods: Scat 4340 forged I-beam with ARP 8740 bolts * Pistons: Wiseco 2618 forged (dished or flat top) * Piston rings: Wiseco GFX with steel top ring * Compression ratio: 64cc = 9.7:1, 68cc = 9.3:1, 72cc = 8.9:1 (can vary due to deck height/gasket thickness) * Camshaft bearings: Installed and clocked to OEM position * Freeze plugs: Brass installed and sealed * Oil galley plugs: Installed and sealed * Weight: 285 lbs.

Not Yet Reviewed

$4,449.99

ATK High Performance Chrysler Gen III Hemi 392 Short Blocks

ATK High Performance Chrysler Gen III Hemi 392 short blocks offer two robust bottom ends for your hot rod. One is perfect for your potent street or race build, while the other is designed for engines that will be running boost or nitrous. These Hemi blocks feature top-of-the-line Scat forged stroker kits. They include clocked camshaft bearings set to the OEM position, plus installed/sealed freeze plugs and oil galley plugs. You wouldn't build a house on sand, so don't start your big block Mopar build with anything less than ATK High Performance Chrysler Gen III Hemi 396 short blocks. Features, items, and specs may include: * Seasoned OE main block (ARP main studs with boost/nitrous version) * 3.927 x 4.050 bore/stroke * Scat 4.050 in. stroke crankshaft (internally balanced) * Scat 4340 forged 6.125 in. connecting rods with ARP bolts * Forged -2cc flat top pistons * Moly or Plasmamoly with steel top ring gapped for boost/nitrous piston rings (depending on application) * 81cc=9.9:1/85cc=9.6:1/89cc=9.2:1 compression ratio (based off .028 in. gasket)

Not Yet Reviewed

$4,199.99