One of the suppliers had a write-up on their website about what cars they came in, and compared them to another make, similar pinion size, no worries with a 741. Can't remember the site or details.
I think it was Dr. Diff, the detail that sticks in my head is that the pinion shaft diameter of the 741 is only .060 inch smaller than the holy grail GM 12 bolt and I don't remember any one saying the GM 12 bolt is weak. They are good units, sadly though they are not supported, typical of how the after market treats Mopar
