I finally did. Most of my life I've always preferred stick boxes, but now I'm old and can't row around a big shifter and clutch.
I have a reverse MVB 727 and I just love it. I'm thinking of putting together a 42RE (A904 based otherwise known as an A500) OD automatic. It DOES require some crossmember work, but not cutting up the floor. Putting in the larger 727 based (A518) OD would require serious floor tunnel work.
