Myron Piatek has a steal on the one. Contact him...
locomo@bellsouth.net aka Locomotion..
here is what he sent me..
If you are looking for a trans-brake compatible converter, I have a new/never installed one from JW Transmissions. I ran a similar one with a little less stall for years in my footbrake only 2,850 lb 360 W-2 Challenger. I think it flashed somewhere between 4,000 and 4,500, but i don't remember exactly. This one was suppose to be a little looser but I never got around to using it. I started racing a Dart Sport with a 904 several years ago.
This is from a Sept. '09 price sheet.
50432ES TF727 8" Converter W/Spec. Sprag 4300-5200 887.68 986.31
If interested I can sell it for $550.00 including shipping in the U.S.