BluePrint BP3961CT GM 396 SBC Base Engine, Alum Heads, Roller Cam

HP & Torque: 491 HP / 509 FT LBS
Compression Ratio: 10.4:1
Aluminum Heads
Hydraulic Roller Cam
Forged Crank
Forged Pistons
Block:

NEW BluePrint Cast Iron Block
Manufactured and Machined in the USA!
Align honed main bearing bore
Cylinders honed on computer controlled machine to within .0002 straightness and roundness
Cylinders are sonic tested for thickness
4-Bolt Main
4.000″ Bore
1-Piece Rear Main Seal
Mech fuel pump provision: Yes
Passenger Side Dipstick
Drilled and tapped for clutch linkage
Rotating Assembly:

New BluePrint Forged Crankshaft
3.875 ” Stroke
Forged I-beam 6.000″ connecting rods
Forged Pistons
Internal Front/ External Rear
Cylinder Heads:

BluePrint Aluminum Cylinder Heads – HP8103
64cc chamber
2.08″ intake/1.60″ exhaust valves
220cc intake/67cc exhaust runners
Cam Specs:

Cam Type: Roller
.544 Intake .555 Exhaust
230 Intake / 236 Exhaust duration
@ .050, 110 ° lobe separation angle
Ignition Timing:

34 degrees total at 3500 RPM
Also Includes:

Valve covers, oil pan and timing cover
Dyno test results shipped with engine
Warranty:

30 month / 50,000 mile
Notes:

A bronze distributor gear is NOT recommended on this engine
Not for use in pollution controlled vehicles.
This engine features a true 4-inch bore, which mathematically yields 389 CID with a 3.875-inch stroke.
93 octane or higher is recommended for this engine.
The performance aluminum cylinder heads on this engine feature a .500 raised port vs OEM.
Warranties

30 month / 50,000 mile