I'm on the lookout for one too. Copied from another post but I believe 2WD needs a 3.727.

3.25 = 39/12 = MA70 Group A (Special race class)
3.727 = 41/11 = MA70 3.0 GT turbo
3.909 = 43/11 = GA70 M/T, most MA70
4.100 = 41/10 = JZA70 M/T and some A/T, some N/A MA70
4.300 = 43/10 = GA70 A/T, also some MA70
4.556 = 41/09 = GA70 GT

Philip.