Well, I've come to the realization AJ has no direct experience (nothing in the last 30 years) and relies on dated printed data, formulas and slide rules. So I just read his posts and laugh. I mean.....and not blowing my own horn here, but it's the truth, I can provide pictures. I'm in the middle of helping people with two different engine builds and it's fixin to be three, plus I just got done putting my headers on Vixen. Even though I'm retired, I try to stay somewhat busy helping others and with my own stuff. I prefer experience over internet myth and forum guru.