[paul2748]

I have a 48 Ford with a 302, C4 and a 3.50 (3.55?) rear. I don't find the engine working that hard when doing 65 or so. Don't have a tach in this car, so ,I don't know what the rpm is at 65.



My TBird has a 3.31 rear gear, no O/D. 2800 at 65 which I don't think is excessive.


If you don't do a lot of highway driving, I would suggest a 3.50, which is fairly easy to find for an 8 inch rear. 3.25 may be a little better on gas, and would be a good comprise between 2.79 and 3.50.