3rd member was leaking, swapped in the 3.91’s, actually ran slower at the track (couldn’t get them to hook).
3.23’s are back in and it’s a breath of fresh air.
3.55's in the Duster and just went from 2.76 to 3.55 in my 72 Newport. If I ever swap to an 8 3/4 I will likely go 3.23.
My 82 C10 has 3.42 gears and my 01 mustang gt has 3.55 also.