Additional Information

• Pontiac 400 Block has a standard bore of 4.120 in.
• Intended for Internal Balance Engines (Assembly is Unbalanced)
• Mahle 4032 Forged Pistons
• 5140 Forged Steel "SIR" I-Bean Connecting Rods w/ 7/16 in. APR 8740 Rod Bolts
• File-Fit Piston Rings
• Performance Street Bearings
• Note: The 1967 Pontiac 400 block has reliefs at the top of the cylinders. All Eagle Pontiac 400 kits are not compatible due to these reliefs.

Compression Ratios

Calculated with uncut block and .040 in. head gasket thickness

• 75 cc Chambers - 11
• 85 cc Chambers - 10.1
• 111 cc Chambers - 8.3

Crankshaft Specs

• Rod Journal: 2.200 in.
• Rod Journal Width: 2.000 in.
• Main Journal: 3.000 in.
• Snout Diameter: 1.374 in.
• Pilot Bore Diameter: 1.383 in.
• Flywheel Opening: 2.750 in.
• Typical Weight: 68 lbs.

Connecting Rod Dimensions

• Length: 6.800 in.
• Pin Fit: Bushed
• Rod Journal: 2.2000 in.
• Housing Bore: 2.3250 in.
• Pin Size: 0.990 in.
• Big End Width: 0.9900 in.
• Pin End Width: 1.1250 in.
• Thickness Above Pin: 0.210 in.
• Typical Weight: 870 g