Discontinued Item: This item is discontinued. Please CALL to see if there is a replacement or an alternative.

Item # BP4961CTF
Weighs 1.0000lbs.

Block:
4 Bolt Main .060 over block, 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 SCAT forged steel crankshaft internally balanced
New SCAT 4340 forged connecting rods
150,000 psi rod bolts
Probe forged flat top Pistons
Hastings moly rings
Rotating assembly balanced to within 2 grams
Melling high volume oil pump
Hydraulic roller cam .566 intake lift, .566 exhaust lift
242 intake, 248 exhaust duration @ .050, 112 degrees lobe separation
Heavy duty double roller (high performance) timing set


Cylinder Heads:
AFR aluminum rectangular port cylinder heads with screw-in studs and guide plates
Blueprint signature series tall alum. Valve covers
2.225 polished intake valves, 1.88 swirl polished exhaust valves
Comp Cams hardened push rods
Jessel roller rocker system with postitive lock adjusting nuts


A Ton Of Extras:
F.A.S.T. EZ Fuel Injection
10.4 to 1 compression
Milodon cad plated oil pan
Brass freeze plugs
All engines are dyno tested on state-of-the-art DTS dyno and come with a complete dyno sheet
30 month 50,000 mile warranty
MSD plug wires



Critical Specs:
Camshaft:
Roller, .510 Intake / .520 Exhaust & 230 Intake / 236 Exhaust duration @ .050, 110* lobe separation angle.

Horsepower:
491

Torque:
509

Compression Ratio:
10.4 : 1

Ignition Timing:
Initial timing - 10-16 and Total timing 32-34

This part fits most Chevrolet Cars and Trucks.; exceptions may apply. Please read the complete description to see if this part fits your specific vehicle and application.

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