Srt-68 Barracuda
Here are three pics of driveshaft differences between the SRT-8 and the Barracuda.
1. SRT-8 shaft is fixed--it has no slip beause the rear diff is fixed in a subframe. It does not have to travel up and down like a conventional shaft.
2. Solution was to make a separate crossmember to carry the center of the shaft perfectly in line with the trans.
3. From there, it becomes what you are used to seeing on the front shaft of most Jeeps. It slips here.
Had my driveshaft guy scratching his head for a while over this--he intitially told me that I was "F@%ed". I told him that attitude was'nt working for me and that I'd kick his *** and do it myself. He relented.
Hope it works. Maybe get a burnout going in a week or so. We shall see.