Most people are happy to get rid of the flange output since the drive-shaft's "Detroit" "ball and trunion" front joint is rare and $$$ to repair. I you change to a sliding yoke output, you get a standard, inexpensive front U-joint. I even saw a post where an early-A guy kept his original tranny, but had a drive shop fabricate a special U-joint w/ in-line sliding yoke to avoid the Detroit joint. Interesting that my 65 C-body has a cable-shift tranny w/ sliding yoke output and column shift instead of push-buttons. That was one year only and confuses tranny shops.
