I picked up a replacement forged steel crankshaft for my 396 but it doesn't have a cast code or gm casting.
punched in the top of the cranks is the code 4813,I can,t find anything on what this crank was out of or whether it is a correct replacement.It looks like its the same and the specs seem to be right.Thanks

4815 is a cast (Nodular) 396/402 crank but that is as close as I can find.

Thanks Dave, I found out that its a crank out of a pontiac, forged steel 400