[makarovboy]

Most of the mustang folks recommend no higher than 3.73 for 5 speed and 4.10 for aod street cars.

If it is modified for street/strip, you can go as high as 4.10/4.30 so trap rpm's will be in the 6000rpm range depending on tire diameter, etc.

It is also recommended that if it is turbo or s/c, no gear higher than 3.73, as you're going to be romping and stomping at the 1/4 mile mark.

3.55's will disappoint you if you even take a ride in a car with 3.73's. You will really get your jolly's if you run 4.10's, but don't get p.o.'d by the mileage, cause it will go away pretty quick. Just depends on what you want the car to do. I hate hearing people say they're worried that they're mileage will go south. If that's a problem, keep the stock gears and run consistant low 15's.