318 Mopar 4340 forged stroker crankshaft 318 Main journal size, 4.000 stroke Rod Journal Size is small block chevy 2.100 Rear Flange 6 Bolt Chrysler This crank when used with a .030 overbore block will produce a 390 cubic inch displacement engine. Fits all 318 1957 - 2003, 318 Poly, 318 and 318 5.2 Magnum
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