I don't like the gear ratio, yeah I know alot of people use them, and they say they like them, but it's not a performance transmission. they are alot cheaper, and easier to find, but IMPO I don't like them. For the extra couple hundred buck's I would get the standard 4 speed. I just picked one up out of a 70 duster on craigslist for $250. Like I said, it's just my opinion!