i've got a little experience in tuning, but only a maf tune for a turbo. i just built a ls1 with 243 heads, ls6 intake and BTR stage 3 cam. it starts up and idles fine but it's definitely lean when driving. i need to know how to get my a/f to a safely tunable level... i guess. i tried alot of different things and ended up really frustrated. the fuel trims are way positive and but adding to the ve table didn't seem to help....