I don't know about Firebird rims, but the big cars are 5x5, not 5x4.75 like the A-bodies.
And my car isn't much of a looker, so don't get your hopes up on that one. But beauty is more than skin deep. I put a bit of a write up about it here.. Kinda long but it was fun.
http://forums.maxperformanceinc.com/...light=mistress
Here are a couple from when 'the delivery' showed up. Had to park the big truck in the middle of the road and push her the block to my house because of access to my street. I'm hoping to have her on the road by Christmas. (Just not sure which year..) Oops... This was actually the loading in Tucson..