Technical Notes:

• For use with 440 "RB" blocks
• Stock standard 440 cylinder bore is 4.320" with 3.750" crankshaft stroke
• 4.350" Bore + 4.250 Stroke = 505ci

Technical Specs:

• Alloy: Premium High Ductility 2618
• Bore: 4.350"
• Crankshaft Stroke: 4.250"
• Connecting Rod Length: 7.100"
• Deck Height: 10.725" (RB)
• Compression Height: 1.485'
• Pin Size: 0.9900' x 2.750"
• Pin Location: Centered
• Flat Top: 2 Valve Reliefs
• Effective Head Volume: 4.5cc
• Intake Valve Relief: 0.215' Depth / 2.300' Diameter
• Exhaust Valve Relief: 0.199' Depth / 1.880' Diameter
• Top Landing Height: 0.260'
• Ring Grooves: 1/16' Top; 1/16' Middle; 3/16' Bottom
• Gram Weight: 577/141
• Compression Ratio: 12.6:1 w/75cc Heads; 12.2:1 w/78cc Heads; 11.1:1 w/88cc