I don't doubt you guys are right, but i just think this is trying too hard to find a solution. My old 302 was so damn wore out the cylinders looked like mirrors except for all the vertical scratches in them. No cross hatch left at all. It had so much blow by it would smoke from the dipstick tube and the valve covers. If you look in that video i posted it blows smoke on every shift. I didn't use anything fancy as far as plugs go, just Walmart Autolites. I think this problem is less about the engine itself and more about the car and/or weight, the suspension, the tires, or the driving/shift points. Shifting at 5k is not how you run 12s with a minimalist build.