400 stroker

Personally I think the 451/470 can be built a lot cheaper than that. Go with a stock forged 440 crank,have the mains ground to fit the 400 block,reuse the stock iron heads with good porting and a valve job and you'll be over 500 h.p and well over that in torque. crazy as it sounds,use hypereutectic pistons and maybe even reuse the stock rods. And always remember,the more you do yourself,the lower the end cost will be.