i installed the 5spd in my 70 b body. had to modify the tranny tunnel, that was unexpected. the shifter handle shakes back and forth sometimes, in 3rd and 4th. also you cannot slam 2nd to 3rd. this has to be a slow shift. i can go 2nd to 5th fast but not 2nd to 3rd. richard has offered to repair this at no cost. all i have to do is remove it and return it. however, this is driving season (we have bad winters) so this winter i will pull it down and return it. richard has been the best to deal with at keisler.