Overview:

This classic small-block engine package delivers 375 horsepower and 460 ft-lbs. of torque with a pump-gas-friendly 9.8:1 compression ratio, making it an ideal choice for street rods, muscle cars, and vintage builds. It features Magnum cast iron heads, a traditional flat tappet cam, a cast crankshaft, and durable forged pistons for a reliable and responsive powerband. Fuel delivery is handled by a proven Holley Classic 750cfm vacuum secondary carburetor with manual choke, mounted on a high-flow intake manifold for strong midrange performance. The package includes a dipstick, valve covers, oil pan, and timing cover, offering a complete, ready-to-run engine setup with a perfect blend of old-school performance and dependable street manners.

Description:

• Horsepower & Torque: 375 Horsepower / 460 FT. LBS. Torque
• Compression Ratio: 9.8:1
• Cast Iron Heads
• Flat Tappet Cam
• Cast Crankshaft
  
• Forged Pistons

Block:

• Hand-Picked Seasoned Magnum Block
• 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
• 2-Bolt Main
• 4.040" Bore
• 2-Piece Rear Main Seal
• Mech Fuel Pump Provision: Yes
  

Rotating Assembly:

• Cast Crankshaft
  
• 4.000" Stroke
  
• Forged Magnum 6.123" Connecting Rods w/ 150,000 PSI Bolts
• Forged Pistons
• Externally Balanced Front and Rear
  

Cylinder Heads:

• NEW Magnum Cast Iron Heads
• Hardened Retainers and Springs
• 1.92" Swirl Polished Intake Valves
• 1.625" Swirl Polished Exhaust Valves
• Hardened Push Rods

Cam Specs:

• Flat Tappet
• .474 Intake / .474 Exhaust Lift
• 233 Intake / 240 Exhaust Duration
• @.050-110 Degree Lobe Separation
  

Ignition Timing:

• 34 Degrees Total at 3500 RPM

Also Includes:

• Holley Classic 750cfm Vacuum Secondary Carburetor w/ Manual Choke
• Intake Manifold
• Dipstick
• Valve Covers
• Oil Pan
• Timing Cover

Notes:

• If installing with a Manual Transmission with .750" input shaft, Recommended Pilot bearing is PN FC-69907.
• Recommended Pilot OD is 1.81"