They do make them for the 4.6, although I have been unable to find exact thicknesses (haven't called them though).
If they make a .090 compressed thinkness it'll drop you to ~8.5:1 compression. .039 is the stock compressed thinkness (technically it's 1mm).
I think it wouldnt be a good idea on just slaping in the gasket knowing that our internals are really weak when they go above 350HP. I mean, sure compression will go low, but I think more of a future effieciency. Did I make sense?
Nitrous and boost go together like peanut butter and jelly
Nuttin make you feel more like a man in a Thunder Cougar Falcon Bird
Everything I've ever read says water injection is a really BAD solution to things... in the ultimate race application, people do anything and everything to gain an inch, but for street/strip use... no way. 2cc's can be gained by grinding out the swirl fins... but i dont know how the drivability would be when not under boost.