all I can tell you is that on 14lbs with a H1E off a backhoe, 120k mile stock 5.0 shortblock, home ported e7s, weiand x-celerator, f-cam, t5, 1 5/8" shorty hedmans and a 3.5" downpipe it made 505rwhp at 5700 and 550rwtq at 3600.
I never took off the final dyno sheet but heres the one I used to...