I'm really not ready to have it rebuilt yet, but I called Hard Shift out of curiosity. When I asked if they had 727 experience the guy said "Yeah, we've done a couple."

...not exactly what I'm looking for experieince-wise.

1968 Plymouth Fury III
2dr FT, 383-4v, 4 speed

1972 AMC Ambassador SST wagon
360-4v, automatic

2014 Challenger R/T Classic 6-speed