GM 496 Base Engine • Cast Iron Heads • Flat Tappet Cam
HP & Torque: 440 HP / 560 FT LBS
Compression Ratio: 8.6:1
Cast Iron Heads
Hypereutectic Pistons
Flat Tappet Cam
Cast Steel Crank
Part #: BP4969CT


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 BluePrint Engines cast steel crankshaft
GM connecting rods
150,000 psi rod bolts
Hypereutectic Pistons
Hastings moly rings
Rotating assembly balanced to within 2 grams
High volume oil pump
Flat tappet cam
Double roller timing set

Cylinder Heads:

Small round internal port
120 cc chambers
Screw-in studs and guide plates
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:

New valve covers, oil pan and timing cover
Brass freeze plugs
Dyno tested – and shipped with results


30 month / 50,000 mile


Not for use in pollution controlled vehicles.

This block does have a mechanical fuel pump provision

Zinc Additive Required For Flat Tappet Application

Recommended Oil For Your BluePrint Crate Engine: 10W30, Non-Synthetic.

Not For EGR

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