And sadly even the 1980's M-body Diplomats and Gran fury's are getting very hard to find nowadays.
Years ago in one of the local salvage joints, about 2013/14'. I pulled my current A999 transmission off of a 89' Diplomat, the Motor was gone, what was left of the car was yellow, but I did see evidence of black and white paint underneath.
Retired Police cruiser turned into a Taxi maybe?
There was another M-body a 1988 Plymouth Gran Fury that had a roller cam 318 in it, the heads were gone, but I definitely saw it had a roller cam in it.
At that time I had no interest in that motor. Mainly because I had the 1991 360 I was rebuilding. However in hindsight, what I should've done was grab the other A999 transmission the Gran Fury still had in it. They were only $145 each as a rebuildable core... Oh well.