The Stovebolt Site Forums The Shop Area Driveline Pre-made drop in open rear ?

I would guess that curries or one of the other performance places would make one if you gave them the dimensions.
I have a 59 so can't say to much about AD series, but wonder if a 54 or early 55 would just swap in, I may be mistaken but I think they were open drive shafts not torque tube rears.