Gimme a break, plenty of people on this website using kb hypers in 500-600hp 440 builds and our "wal-mart engines" are surviving just fine. I don't think the hemi pistons are going to be any worse. But I know there is a lot of brainwashing with the hemi crowd that it must cost $$$$$$$$$$$$$ if it is a hemi part. With that said, the cost difference between buying a set of forged vs hyper pistons for a hemi is literally a drop in the ocean so it really boils down to what you want to do.

Also, has a machinist checked out your block to find out if it'll cleanup for your .005 oversize pistons..?