It takes about HALF the money to build a turbo 400 to hold up to the same power that will break a race prepped 727.......much less a 904. Sure, I guess one could be built to "last". Buckey Hess ran a 904 in his Hemi 68 Barracuda. But the money it takes in comparison to a turbo 400.....plus they are much stronger. And yeah, it's a pretty popular swap in the high horse power ranges.