First off I am in a 67 4dr falcon (wieght is 3055 with me in it)and I just went to a tci 10 inch converter on the street (from a tci 11 inch) from a cruising stand point I don't see any real difference I did pick up about 2 Mpg's though. I don't know why don't ask it should have gotten worse not better. I am running 3.25's and a 24 inch tall tire. The other thing is REV how often do you get to the track I am there at least ever other wed. I have the green/white falcon.
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