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Chevrolet Performance HT383 C.I.D. 323 HP Crate Engines
GM HT383 CRATE ENGINE 323HP
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Estimated Ship Date: Oct 19, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
19435448
Part Type:
Product Line:
Summit Racing Part Number:
NAL-19435448
UPC:
197224822263
Crate Engine Family:
Chevy Small Block
Actual Engine Displacement:
6.3L/383
Crate Engine Cylinder Head Material:
Cast iron
Engine Block Material:
Cast iron
Advertised Compression Ratio:
9.1:1
Assembled:
Yes
Engine Balance:
External
Cam Style:
Hydraulic roller, OE roller
Rear Main Seal Style:
1-piece
Intake Manifold Included:
Yes
Intake Manifold Style:
Carbureted
Cylinder Heads Included:
Yes
Carburetor Included:
No
Throttle Body Included:
No
Distributor Included:
No
Oil Pan Included:
Yes
Valve Covers Included:
Yes
Timing Cover Included:
Yes
Water Pump Included:
Yes
Harmonic Balancer Included:
Yes
Flexplate Included:
No
Flywheel Included:
No
Air Cleaner Included:
No
Spark Plugs Included:
Yes
Spark Plug Wires Included:
No
Computer Included:
No
Wiring Harness Included:
No
Water Pump Style:
Long
Supercharger Included:
No
Remanufactured:
No
Quantity:
Sold individually.
Notes:
Distributor with Melonized steel gear must be used
Chevrolet Performance HT383 C.I.D. 323 HP Crate Engines
Specially tuned for torque, the all-new HT383 delivers great power in a small block package for your truck or street rod. These Chevrolet Performance 383 c.i.d. 4-bolt main, cast iron engines, have approximately 9.1: 1 compression with 323 hp at 4,200 rpm, and 444 ft.-lbs. of torque at 3,000 rpm. Included with these engines are forged 4340 steel externally balanced crankshafts, 5.7 in. powdered metal connecting rods, hypereutectic dished top pistons with offset pins. Hydraulic billet steel roller camshafts are installed with .431 in. intake lift, .451 in. exhaust lift and duration at .050 in. for intake is 196 and 206 for exhaust with lobe centerline at 109 degrees. Stamped steel self aligning rocker arms with 1.5:1 ratios are installed on the Vortec cylinder heads. All aluminum dual plane dual flange intakes with external EGR provisions, cast iron long leg, standard "V" belt rotation water pumps with 1979-86 power steering pump boss. Valve measurements are 1.940 in. for intake and 1.50 in. for exhaust. Additional items installed with these crate engines are 8 in. harmonic balancers, 12 3/4 automatic flexplates, 4-qt. oil pans with windage trays, painted valve covers with oil cap, grommets, provisions for PCV and breathers. Composite front timing covers, brass freeze plugs, engine oil dipstick and tube for passenger side location. Spark plugs come installed along with fuel pump block-off plates and Engine lift tabs for easy installs. These HT383 are ideal replacements for any 1978 and older carbureted engines or off-road applications.
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