[Ralph Greene]

If I were going to seriously drag race my Mach, and still wanted 4.10's for street use....I would get 4.30's and some street wheels and tires about 5% more diameter than stock effectively giving me 4.10's for street use (4.30's 5% lower than 4.10's), and then correct speedo for 4.10's. Then use stock diameter race tires giving me 4.30's at the strip.

But with our .62 5th, if you like to drag race, 4.30's are not a problem for street use like in the past when OD gears were more in the .67 (T 45) and .68 (3550 and T 5).