Please help me find this bog...

I ran 73-74/82 in my proform 750, thats really all a quickfuel carb is, thats what there carbs are based on, a PF main body, I think your going lean with that 77 jet, drop in some 82s out back & try again, THEN keep jetting up F&R untill the MPH slows, I think you'll make your best power at 12.6-12.8 WOT.