Gear changing Question???????
7.5" refers to the ring gear size, that is standard in the GM 10bolt rears
I think "10 bolt" means there is 10 bolts holding the ring gear to the differntial.
12 bolt rears are definatly heavy duty, but aren't cheap at all. Hard core drag guys won't go without 'em though.
To figure out your ratio, someone spelled it out very well here recently, just do a search on it.
Read up on previous posts, theres alot of excellent info on this site, and btw, THIS is the best site for LS1 information!
This is an interesting tool that you can use.
http://www.f-body.org/gears/

