I tuned a locals 04 CompG with nothing but a downpipe, PEMs, an intake, and a 3.4 as major mods. Had a 180* tstat, Autolite 104s, and some PRJ spark plug wires. I got him running knock free wide band tuned with a decent AFR and acceptable timing.
I can do mail order PCM tuning if anyone is serious

. I have an extra Powrtuner I can ship you if you put down a deposit and upon shipping it back you will get your deposit back.