572 Block?

[monmon030791]

Right now I just bought a 454 block with a 4 bolt main for $375. Basically to make it a 454 I need to get the 454 rotating assembly to make it a 454, can I make a 572 with this block. My friend said I need a 502 block or something like that and I was looking and GM performance parts and I'm pretty sure they use the same block I'm using with a 572 stroker kit? Am I right or wrong if so, what block do I need in order to get the stroker kit to make a 572! Thanks!!