Yes, I as thinking large car, hence the 235/75/15s.

The beauty of the NAG1 is it has the 4.32:1 (3.59 to 0.83) gear spread. So you don't need to run 3.91s. A 727 with a 3.91 has a first gear overall ratio of 9.58:1. You'd get that same amount of multiplication using the NAG1 and a 2.66 rear gear. Or the deep ratio A-998 with 3.91s = 10.71:1. Similar NAG1 rear gear would be 2.98. Plus the 2.47 OD effective ratio.

It's all just calculation. I know what I'd do if I had the budget and workspace. Unfortunately I have a stash of two-generation-old parts and they have all become obsolete. Anyone want some J heads?

R.

(actually they are so far under the workbench that I doubt I'll ever find them again)