Dynoed a 496 last weak, Canfield 310's, Ported victor, 1050 AEd carb, Howards roller, 268-276, .765-.722. 10.5:1, pump gas, made 790hp at 7100, 646tq at 5200. Heads are obviously worked pretty well.
This engine was a 460, that I had built for the guy years before, that he wanted freshened and turned into a 496. The 460 made 745 and 600 ft/lbs with the same cam. made it a 496, just new, same everything else.
car ran 10.20's at 3800+ pounds, stock suspensin, 70 chevelle, drag radials and exhaust. Take the exhaust off, put some slicks on it, and it would have gone 9's easy. It should go in the 9's now in street trim.
With a point of compression, and a vaccum pump, it would have made 820.
Frank