On my "big project" I am doing dual R150s with a custom adapter plate and 23sp gear drive t-case. But heres the kicker. I am running 60/70 and 6.17 gears and also I am going to invest in an offshore gearset with a 4.0 tcase.
do that math....
5.15 x 3.83 x 4.0 x 6.17= 487:1
if you want to get crazy think 'bout this
5.15 x 5.15 x 5.1 x 6.17=845:1!
