Dave, Out of curiosity... why do you want to switch to this gear? In my experience with the 3.07 (TT), 3.31 (Open & TT), and 3.73 (TT) behind 259's and 289's (stock and modified), 3sp, 4sp, and automatics... I think it's the worst choice of all of them. I hated ours in the Wagonaire(stock 259/AT)...'60 Lark 4-door (259/AT didn't keep long-sold it), and Linda's Hawk (mildly built 289/AT). I switched them as soon as the opportunity rose. Even in the flattest of country, you will NOT get a MPG increase... in fact, it's likely you will find a decrease. IME... Stude engines love to cruise in the 2500-2800 RPM range for best economy, mileage and performance. Drop them out of that "happy" range, and you will find yourself putting your foot down more to maintain speed on even the slightest of hills, passing, and especially taking off from a stop.
I would recommend no higher than 3.31 for a stock or mildly built V8 automatic, 3.54 for a stock or mildly built V8 w/3 or 4 speed, and 3.73 for a 3.OD. Move 1-gear range lower for "hilly or mountainous" country. Perhaps if your plan is a 200/700 R4 AOD Transmission- the swap will yield worthwhile results.
Ray
So. Ga. Cruiser wrote:
Last year I put out a call for this rear end for my 62 Cruiser, with no results. Still hoping to find this skeester, near Georgia hopefully! If any one has a lead on a good one, please drop me a line. CHEERS! Dave Miller South Ga. SDC Big Bend SDC
--------------050703080606040009000607--