Guys, i have a '99 with a built engine, 6# lower, ported eaton, new msd coils, new 255 pumps, new plugs and a sct custom tune. my problem is when i hit over 10# of boost engines starts missing really bad! i do have the overboost and a trans shift selector range code but, will these cause this? i did leave plugs at stock gap..well, i was too lazy to do it myself and didn't mention to the installer to close them down to .035. anyway, any ideas? also, i want to run a 150 shot..what cha think? again, i has mahle pistons and eagle h-beam rods. thanks for any help!