First, I definitely wouldn't suggest running too thick of a headgasket. While it does lower compression, it also gets rid of quench. When quench goes down, detonation goes WAY up. If you put a 1/8" head gasket on it, it would detonate worse than if you tried to run 10:1 with boost. Do it right or don't do it at all.

Second, please let me know when you find a junkyard with Turbo Buick 3.8's in it. The only junkyards I see are filled with Grand Marquis, GM FWD crap, and mexicans.