IIRC,the 413 heads are not worth that much for performance

a steel crank will have the thin damper on the crank

a thick bullet nose damper (like mine,79 MH) is a cast crank

cast crank 440 is just as good as a steel crank 440,IMHO

could be some one out there that wants the 413 engine..and the other 440s as well,they dont make them any more and getting few and far between,IMO

I could use one of the flat rubber tranny mounts myself