OK HERE WE GO! I am dying to get this together, we picked up richards (99silveradoss) ls1 the other day. I am going to be using the ls1 heads to go with the ls6 cam I have in my 03 4.8 . When richard gets his ls1 dropped in I will build his 5.3 bullitbroof & boost the hell out of it . But until then I will be porting & polishing the heads & decking them about .0030 unless someone else has other suggestions. the truck pulls hard with the ls6 cam on the big end & I dynoed out at 285 rwhp before any tuning or the headers & stall was installed. I am wondering what tables should I change in ls1 edit & how much to compliment the cam & heads. What about stocheometric air fuel ratio, in edit there is a part where I can change the number but I also know that the o2's are not accurate very far past that. Anyway any one who can help please, I am dying!