Did you say 2k?
I've got a car and have decided what I'm going to do IF the 904 ever goes out. (It's 1974 original. May never die).
I'm going to get the Keisler 5 speed conversion. Looks like it's a bolt in. No cutting.
And I think it is in the 2-3K range. http://www.cuda-challenger.com/cc/index.php?topic=73870.15
Money well spent cause I'm going to keep the car.