I agree that a W8/9 turbo engine could compete. I think the GenIII Hemi can as well, just unsure of the blocks holding up and gasket sealing with a lot of manifold pressure. I'd be a little less apprehensive about spending the money on a GenIII Hemi if they had a proven race block like the W8/9 does. I'd probably build a little smaller engine around 400 ci.

I really just need to decide whether I really want to spend the money. I'd have to sell a few Harley's, my PS Hemi and possibly some other goodies to finance some of it so it would be a big commitment for me to do it. I really don't want to go into debt if I decide to build it. I have access to a body and have some of the parts as well, just need to take the plunge .

If you decide to do it best of luck and keep us posted on your progress!