I'll help you out since you are a fellow Swabbie! The best place to post that question is in the general turbo buick forum. This forum is for the good, bad, and ugly of transactions. Both our posts will probably disappear by the morning by Jesse, the moderator.
This site rocks and will be able to answer 99.9% of your questions. Just be sure to read rules of each forum, and learn to use the "search" button. The search button can answer most of your questions because usually someone has already asked the same question (many times!).
I am not dogging you the least bit, just showing you the way like someone did me a while back, and it was a great help. You may be able to find someone that runs a part you are considering and can ask them about it. (I do it all the time!!!)
About the wheels, post the question in gen turbo buick section, and PM or email Brian Weaver at Gbody. Many, many people buy from him and he knows what he sells. Just check the feedback forum!
Good luck with your ride, and, uh, enjoy Newport news!!!
Squid