Dang, so many questions!
1) It depends on the tire/wheel combo, I think mine was 45" wheel surface to wheel surface.
2) 3:73
3) yes, rebuilt posi
4) progresive 175- 250
5) no, I love it, it handles great
6)good, still working on it, just added linelock to heat my drag radials
7) T56
Hope this helps!