I'd rather start with a forged unit personally. A 470 is going to cost at least 6k to build decently, why push all those chips in on a cast crank when he could likely find a forged unit for under $150. ??

Certainly not saying it can't be done or that my opinion is gospel, just my thoughts.


Edit: quick scan of eBay:
http://www.ebay.com/itm/MOPAR-CHRYSLER-413-FORGED-STEEL-CRANKSHAFT-CORE-for-regrind-1964-fits-440-/201658719361?hash=item2ef3cbdc81:g:KK4AAOSwIgNXtkJZ&vxp=mtr