GM 496 Dressed Engine • Cast Iron Heads • Flat Tappet Cam
HP & Torque: 480 HP / 550 FT LBS
Cast Iron Heads
Hypereutectic Pistons
Flat Tappet Cam
Cast Steel Crank
Part #: BP4963CTC


Seasoned block, bored .060 over 
Two piece rear seal, drivers side dipstick
Square and parallel decked
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 cast steel crankshaft
GM connecting rods
150,000 psi rod bolts
Hypereutectic Pistons
Moly rings
Rotating assembly balanced to within 2 grams
High volume oil pump
Flat tappet hydraulic cam
Double roller  timing set

Cylinder Heads:

GM cast iron oval port heads
120 cc chambers
Hardened retainers & keepers
2.25 swirl polished intake valves
1.88 swirl polished exhaust valves
Hardened push rods
Long slot rockers

Cam Specs:

Cam Type: Flat Tappet
.552 Intake .555 Exhaust
230 Intake / 236 Exhaust duration
@ .050 - 110 degree lobe separation

Ignition Timing:

34 degrees at 3500 RPM

Also Includes:

Aluminum intake manifold
New valve covers, oil pan and timing cover
Brass freeze plugs
800 CFM carburetor
Dyno tested – and shipped with results


Not for use in pollution controlled vehicles.

This block does have a mechanical fuel pump provision

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