I made 550 hp and 610 ft/lbs of torque on the dyno with pocket ported 452 heads. I later switched to Edelbrock heads and picked up about 2.5 tenths, so I am guessing at least an extra 25 hp and who knows how much more torque. It had a 4.15 Eagle crank, dished Icon pistons, about 9.5 compression, Holley Street Dominator, Holley 750 DP and 1 3/4 headers. I know everything is too small according to the experts but it was a torque monster.
