I would love to put a 3spd OD in my 60 Belair. However I am not sure what to look for or where. I did some research but I'm still not 100% sure of the years. Here is what I came up with so far:
3spd OD was first offered in 55 and the same one was used till 57.
After that it was offered 58-64 but was different than the 55-57 trans ie, I can't put a 55-57 trans in my car (differnt mounts)
I am also wondering how common were these? Are they hard to find? I know there are some electrics and switches involved.