I built my first BBC stroked to 496 for my 69 corvette, Had it on a mustang Chassis dyno but was not impressed. I thought I should have a lot more HP and torque. The Torque and HP curves are wavy at best. Maybe you can help me find where I went wrong. Dyno results Torque=468. HP= 498. at 7.7 lbs of boost. My setup Dart Big M block to 496ci 9 to 1 comp ratio Edelbrock RPM heads #60555 not ported. 315 long intake runners, 300 short intake runners, 118 chamber. 1.7 roller rockers. Comp Cams roller ADV DUR: 293-383 DUR @ .050: 238 248. LOBE SEP: 115. Comp tech spec'd out for my car. Blower shop 250 blower for BBC. (to keep it legal for Pa). BDS 8 nozzle 800 HP bug catcher. with FAST ECU.