Rear End Gears

65 Dartman said
mag I guess I need to add a bit more info! It ‘s my conversion wagon. Engine is a 66 273 Formula S built to pretty much stock specs. Cam is from Racer Brown nothing exotic. Trans will be the A500 with OD and LU with a stock style converter spiced up just a bit by Dynamic Converters. Rear end will be a LBP 8.75 that currently has a 742 case 3.23 Sure Grip in it that should have worked nicely with the 65 833 that WAS going in. Rear end is sitting on a homemade stand is ready to be installed so right now gear swaps would be easy if needed.

I think a 3:23 would work fine. I think the a500 has a low 1st. gear to get you out of the hole. That combo should get darned near 20 mpg/hwy without the lock up and overdrive. Mid 20's with. The higher the rear gear the peppy it will be off the line. You could probably run a 3:73 or a 3:91 and still get good mileage in OD and lock up.