I have a 90 Notch, Procharged 393 stroker. Put the supercharger on same time I put in the new transmission (Levy Racing built T-5) and the new clutch which is a Quartermaster 8.5 single disk. Clutch is supposed to be good to 700-800 ft pounds but it slipped at around 5200 rpm for 3/4 runs, only the final run did I manage to get a full pull out of it and make it up to 6,000, which made 563 ft lbs, which is about 675ish at the crank. What could be causing it to slip? Clutch only had maybe 20 miles on it before I did the pulls but the guy at the shop said that shouldnt affect it. Transmission is also having some issues but would that cause any issues to make it slip? Any help is appreciated, thanks.