Shaftmasters
1668 John A Papalas Dr.
Lincoln Park, MI 48146
313-383-6347

FWIW the newer mustangs (seen it on manual trans cars don't know about auto) use a flange on the transmission and a driveshaft with a slip spline in the middle. Maybe that stuff would work for you.

i called shaftmasters and they said they can make me a driveshaft witht the slip built in . it will be aluminum and have an adapter to bolt to the flange. i need to send the flange and they said it will be about $650. so i canceled my order for the factory challenger driveshaft since it has been about 2 weeks and hasnt came in yet anyway. it was going to be $380 plus the price to have a shop rework it to work in my car.

I can bring in a flange for you for measurement purposes since I'm going to have them do mine anyways, then I'll get a chance to see the finished driveshaft before they send it out to you. Let me know if you want me to do this for you.

that would be grear, it would save me shipping the flange to them. Is your flange from a 6 speed?
you might even get a better deal if you tell them you need one at the same time and they can make both parts at once on the CNC machine.