408 stroker engine build

my nodular iron crank holds fine in my 4 spd car, and I'm not nice to it either.

that cam is small'ish and in no way will u see over 6500 rpm with it.jmo

your fine with a nodular iron crank, however I do not have faith in the cast steel cranks cause I've seen and heard of too many failing above the 500hp level, meanwhile the nodular cranks live to around & a lil over 550hp.

from my research I would rate them like this..
weakest to strongest .
cast iron
cast steel
factory 1053 steel
nodular iron
forged steel 4340

This info comes from builders that I know and circle track mag/hot rod/etc...

forged is the best, but like anything...it's only gonna matter if you run above 500 hp and 7000rpm shifts, or basically if you use it beyond a certain level...