Chrysler Small Block Compatible 408 c.i. Engine - 375 Horsepower - Long Block

Overview:

This long block engine delivers a solid 375 horsepower and 460 ft-lbs. of torque with a reliable 9.8:1 compression ratio, making it a strong foundation for street performance or muscle car builds. It features durable Magnum cast iron heads, a classic flat tappet cam, and a cast crankshaft paired with forged pistons for added strength and longevity. Included components like the valve covers, oil pan, and timing cover make this a ready-to-build long block that offers the perfect balance of old-school muscle and dependable power. This engine comes with Magnum heads so it will require a Magnum Intake Manifold (BPP7577).

 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 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:

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

Ignition Timing:

• 34 Degrees at 3500 RPM

Also Includes:

• Valve Covers
• Oil Pan
• Timing Cover

Notes:

• This engine features Magnum heads. Will require Magnum intake manifold such as BPP7577
• Not for use in pollution-controlled vehicles
• If installing with a Manual Transmission with .750" input shaft, Recommended Pilot bearing is PN FC-69907.
• Recommended Pilot OD is 1.81"