NOTE: This is a NEW, Unbalanced Crankshaft, in original crate.  No GM PN on crate.  Crank year model applications are visually the same.  The only difference between the 3 known GM part numbers is the bob weight used to perform factory balancing.  Bob weight for piston/pin/rod assembly is different between 90~95 375Hp and 93~95 405Hp engines.