Actually I would suggest Bruce at http://www.ptsnctb.com/
for a stout 200-4r
if a person lived on the west coast area.
Years ago when the Art Carr company was sold we bought a bunch of tranny cores and pieces ...... I dissected a few of them
Some people are like Slinkies... Not really good for anything, but they still bring a smile to your face when you push them down a flight of stairs.