GM 383 Base Engine | Aluminum Heads | Roller Cam | POWER ADDER
HP & Torque: 440 HP / 445 FT LBS
Compression Ratio: 8.5:1
Forged Pistons
Forged Crank
Part #: BP38316CT1


4 Bolt main
1 piece rear main seal
Passenger side dipstick
Align honed main bearing bore
Cylinders honed on computer controlled machine to within .0002 straightness and roundness
Cylinders are sonic tested for thickness

Rotating Assembly:

New forged crankshaft
3.75" stroke Forged pistons
Forged rods with 150,000 PSI bolts
Hastings moly rings
Melling high volume oil pump
Hydraulic roller cam
Heavy duty double roller timing set

Cylinder Heads:

BluePrint Performance aluminium
Hardened retainers and springs
2.02 swirl polished intake valves
1.60 swirl polished exhaust valves
BP Aluminum Part# H8002K
For complete head specs, click here

Cam Specs:

Roller, .536 Intake
.555 Exhaust
224 Intake / 236 Exhaust duration @ .050
113 degree lobe separation

Ignition Timing:

34 degrees total (at 3500 RPM)

Also Includes:

New valve covers
Oil pan and timing cover
Brass freeze plugs
Dyno tested - shipped with results


This engine requires a non-weighted 8" harmonic balancer, and late 350ci weighted flexplate/flywheel.

Please see Recommended Add On's page for additional parts.

**Engine was designed as a Power Adder.

The HP and Torque numbers came from us dyno testing with a 750cfm carb

*A bronze distributor gear is NOT recommended on this engine

Not for use in pollution controlled vehicles.

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