I just pulled the motor out of a cutlass I bought(being told it was a 455)when I got it out I noticed it had a toro oil pan on it so I pulled the pan off to find the N on the crankshaft.which means a steel crank right?it has an F block and I guess my question is, 425 or 455 ?Ive read that the cam shafts are not the same and cost more.can I put this crank in a 455 .what are your thoughts.thanks for the help guys

 

N is nodular iron and the F is a 455.