Head gasket problem HELP

Well, you're blowing gaskets for a reason. By throwing a stronger gasket on there, you'll just make the pressure go somewhere else (rings, seals, etc).

With that sort of setup pushing that much boost, I would definately get that thing dyno-tuned.

I will ask this first. Did you replace your factory head belts with quality parts. Don't use the stock(factory) head bolts because they will not give a good torque to yield when reused. If you have replaced the head bolts, have you checked that your not lean at WOT with a A/F Meter. Till you figure out your A/F ratio don't install anything that will not give because head gaskets are cheap but pistons are not. Use the weak factory head bolt count and location to your benefit.