New converter

I certainly have no quarrel with the Lenny recommendation, and i have NO personal experience with them, but i hear that the owner of PTC is a mopar guy, and i see his contingency stickers on LOTS of really fast cars.
Just somebody else to check with.
(Personally, i would look for a tight nine inch converter.)
There is a local guy that bought an Atlantic Coastal converter thinking it would work on his 727. He's asking $400 for it. It is new but...its 5000 stall. How well would it work on short trips to work and short cruises?