Welcome to the forum Jim.
So is the Damson monster running 500 at the tread or at the fly?
If you have a search on my50z.com, there are a few extremely powerful 350's that come to mind immediately, do a search on "NITROUS" or his cars name is Alyessa (I think he spelt it, before he got the R35) that was putting out some very serious figures, or Noah who's running an LS2 motor in his 350. There are others, but if you look at the "forced induction" subforum you'll find them pretty fast.