Still curious--if you want a powerful yet streetable Buick V6, why are you wanting to complicate things on your first build with twin turbos and all the custom headers and plumbing associated with it? If you drop in an entire '86-'87 drivetrain with computer and wiring harness like I mentioned earlier in this thread, you'll be in the low 14s in the 1/4 mile and for not much more $$$ you can have it doing 12s or better. Yeah, this setup is common in turbo Buicks but *not* in '82 Grand Nationals. That would make a pretty special car even more special IMO. Not to mention, you don't want to get too wild with a T-top car anyway.