Depends on the amount of off set. My 8.8 is not a centered diff but my output on my TC is. When I first put the rear in the angle looked a little scary but after several months of driving it I haven't had a problem, no vibrations or U joint failures. Also a longer wheel base should pose less of a problem since the angles will be reduced.
Thanks, it's actually on a J-10, I'm looking at putting a Dana 300 or a Dana 20 on it. If I want the 300 I have to change to a TF 727, if I want the 20, I have to find some adapter somewhere. But thanks for the help. Any more help or insight would be greatly appreciated.
If you are replacing the quadratrac with a centered output transfer case, you should be ok with the J-10. The driveshaft is long enough to not worry about. It is only offset 2-2.5" more than a "non offset" J-10 which is offset already to give room for the gas tank. I was running a quadratrac with a "non offset" wagoneer axle with 4" of lift without any vibrations but u-joint life was only about 500 miles. (lifetime warranted) Now I have a quadratrac wagoneer axle and the driveshaft only has about 1" of side offset. Just make sure the pinion and transfer case output are parallel. (or the pinion a degree or two down.)