Posi Unit For Dana44 Rear

Ok, so my buddy just bought an 87 Wagoneer with a d44 rear end. He's gonna use it for a street Jeep. After he dumps the stroker in, he wants posi in the rear. Does anybody know of a company that makes a posi unit for the Jeep D44. He doesn't really want to run a locker, but he just wants better traction. any help would be great! :spin1:

Detroit Trutrac and I believe Auburn offers them. Trutrac is a Torsen setup and the other a clutch type.