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ATK High Performance GM 383 Vortec 390 HP Stage 3 Long Block Crate Engines

Pack Vortec power and stroker torque in your ride with ATK High Performance GM 383 Vortec 390 hp Stage 3 long block crate engines. These engines are hand-built and balanced to ensure a strong-running, reliable engine for your daily driver or hot rod. The 460 ft.-lbs. of twist make these extremely versatile mills that are at home in a towing rig, muscle car, or street rod. Get back out on the road with the ground-pounding power that only a stroker can give you. Engine specifications: * HP: 390 * TQ: 460 * Block: OE roller block 4-bolt main 1-pc seal 1996-2000 * Bore/Stroke: 4.040 in. x 3.750 in. * Displacement: 383CI * Crankshaft: Scat nodular iron external balance rear of crank/internal balance front of the crank * Rods: Scat I Beam 5.7 in. rods with ARP 8740 bolts * Pistons: Hypereutectic 9.5:1 compression * Rings: Moly * Camshaft: Hyd. Roller * Cam Specs: 220/224 @50 .495in/.502ex 110LSA * Timing Chain: Double roller * Cylinder Heads: Dart vortec cast iron 67cc/165cc 2.02/1.60 * Rocker Arms: Stamped steel 1.5 ratio * Oil Pan: Rear sump 5qt (not for Chevelles with steering behind crossmember, some Corvettes and 62-67 Chevy II's) * Oil Pump: Melling STD volume * Balancer: Internally balanced – PowerBond #PB1046-N * Flexplate: Externally balanced – Pioneer #FRA-159 (with scat kit) * Intake Manifold: ATK HP dual plane * Distributor: HEI (Iron Gear) * Water Pump: OE long pump * Carburetor: Quick Fuel 680CFM vacuum secondary's electric choke #HR-680 * Fuel Pump: Holley mechanical 110GPH #12-327-11 * Spark Plugs: Autolite #605 * Spark Plug Wires: 8mm Engine info: * Oil: Conventional/Non-Synthetic 10W30 * Oil Filter: Wix or K&N * Timing: 34-36 Degrees * Spark Plug Gap: .035 in. * Firing Order: 18436572 * Octane: 91+ * Stall Converter: Stock * Exhaust: 1 5/8 Headers

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$5,998.99

$5,100.50

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KB Performance Pistons

KB Performance hypereutectic pistons are made from 390 aluminum alloy and heat-treated to T6 standards, which makes them 30 percent stronger than ordinary untreated hypereutectics. Their 100 percent CNC-machined crowns, high upper compression-ring location, gas-accumulator groove, drilled oil returns, and spiral-lock retainer grooves make these pistons outstanding for performance applications. They have a lightweight, rigid-rib skirt design that stabilizes the piston in the bore. All of this adds up to pistons that fit tighter than forged types, provide improved oil control, reduce blow-by, increase ring life, eliminate cold start-up knocking, and won't cost you an arm and a leg! Thousands of models are available—find the set and options designed for your vehicle and engine application.

4.45 out of 5 stars ( 137 )

$364.99

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$397.99

$209.50

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$285.50

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Summit Racing™ Hypereutectic Pistons

These Summit Racing™ hypereutectic pistons are made with 16-18 percent silicon and a T5 heat treatment for greater strength, as well as scuff and seizure resistance. They have a diamond-finished crown and piston skirt that is manufactured to exacting tolerances.

5.0 out of 5 stars ( 1 )

$24.99

$12.99

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