I run a 572 @3340lbs. 2 Eddys which is probably down 25-30 hp from a 4 barrel. 10.5Wx31 w/4.10. 727, stock 2.45, 9" Ultimate converter, 5600 flash. Car runs easy 5.90's w/o spinning anywhere I've been. I'm actually going to swap in a 4.30 and loosen the convertor.
Doug