Callies BBC Crankshaft 4.250 Stroke 4340 Forged Magnum

Callies BBC crankshaft 4.250 stroke 4340 forged magnum crankshaft Big Block Chevy Crankshaft  Internal Balence  4.250 Stroke  2.200 Rod Journal  4340 Forged Magnum  Lightened Yes Weight 71 lbs 1 / 2 Piece Rear Main Seal 2-Piece Nitrided Yes Gun Drilled Yes Stroke 4.250 in Main Journal Diameter 2.750 in Rod Journal Diameter 2.200 in Narrowed Bearings Required Yes Intended Balance Internal Minimum Rod Length 6.385 in Snout Style Standard Counterweight Quantity 8 Balancer Bolt Thread 1/2-20 in Crankshaft Key Quantity 2 Flexplate / Flywheel Mounting Bolt Quantity 6 Alloy 4340 Material Style Forged Material Steel Color Natural Finish Natural Quantity Each