700r4 would have me at approx 1800 rpm with 3.08s and 31s doing 75mph. Th400/th350 would be 2500 with the same setup at 75. Not sure which would be better. Unloaded I would probably be in OD a bit. But with the camper I would be 3rd, which is the same as the th trannys. I’ve been wanting to get...