[KingLT1]

I would upgrade the fuel system, switch to e85, and leave the boost where it is. I just said LT4 fuel system earlier because it should be done either way. Most of these engines blow up trying to squeeze too hard on the stock fuel system. Also they get the car dyno tuned on a non load bearing dyno and fuel looks good but then blows up on a long street pull because fuel pressure dropped. That is one critical thing that gets overlooked...non load bearing dynos do not simulate real world conditions, so what the car does on the dyno, will not be achievable on the street or track.