This is a motor home 727 (not sure if that makes a difference) and it was a few years ago, it did involve some mods had to grind a tab on the trans, but I can not remember what else I did, it was minor. This was when it was column shift car.
It was a pain to get it off when I went to floor shifter.
Somebody on www.bigblockdart.com would know for sure.