What needle and clip position do you have in it, timing set at? Do you have a temp gauge on it? My drag ported 421 cub with pretty much the same setup, (35 pwk's, k&n's, vf3's, inframe sheare's, timing at +6, mixing 114 oct @40:1) and pretty much the same elevation is jetted at 148 mains, 48 pilot, cel needle on the 5th clip position. I am still a little rich on my main's. I had it tuned on the dyno a few weeks ago and rode it pretty hard last weekend and it was running a little rich both times but I left it alone. Even after a lot of passes by me and my buddy mine never got above 165 degrees. Last year I had an air leak that I got sealed once but came back. Hope that helps.