Well, he does have a Dana, but the Chevy forums or something like the Yellow Bullet are probably a much more effective place to find an answer about Muncie transmission tech, althouh there are some very knowlegable folks on this site, hence the bump.

1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's
1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)