A500 in a 1970 A Body
It can be done but it requires major trans tunnel and crossmember surgery. Is it worth it? I don't know. I know that if I wanted to continue to drive my car on the street an overdrive of some sort was going to be necessary. These days I'd probably look at Kiesler 5 speed conversion. I know they are costly but probably worth it. I wouldn't flip the coin to put the GM O/Drive in my Mopar though. Just couldn't bring myself to do that.