That is what I want to try first. I trust the guys at PAW to give me a basic running engine kit. The vacum advance seems to be the problem because without it connected the truck runs fine. I know that I was able to adjust the advance on a chevy distrtibutor by inserting a small allen wrench into the vacum port opening and turning a small screw inside. Hope I can do the same with my NAPA distributor. Thank you for your input. Dyno time can be so damned expensive.