[cadillac512]

Joe, to figure overall ratios simply multipy the transmission gear ratio X the rear gear ratio. Your 4.03 X 3.25 will be 13.09:1 overall. Changing to a 3.50 first will be 14.1:1 and be virtually useless IMO.

As mentioned above, the Mustang ratios are much better, especially combined with a rear gear that works best for your desired cruise rpm. It's really the only way to have both ends of the gear ratio spread work well.


The next best choice (IMO) would be to use 4.11 rear gears and simply skip 1st gear, essentially making your trans a 4 spd. Then the ratio spreads will be a lot better for spirited driving than they are now, and cruise in 5th will be just a bit lower rpm than 4th is now.



Terry