I've read a few times about people using xj drive shaft. I haven't read anything that clearly states what works and what doesn. I'm not familiar with these drive shaft , do they have a slip yoke a transfer case? Are they longer?
I get a little vibration at 30-40 but it goes away at highway speed.
Soa with stock springs. I moved the rear forward to compensate for driveshaft length.
I'd love to move it back and strech it, just can't afford a custom drive shaft right now