I took the short overload out and put the relocation plates in. Worked out pretty good. We've never had any vibe issues with any of our drivelines. For instance, when I put the dual cases in, the rear we shortened in a lathe and used a dial indicator to get it as true as possible. The front was lengthened by an internal sleeve. This was mocked up, put into the front and spun between the two yokes and checked with a dial indicator, tacked, then removed and buzzed with the big 460V Mig. I also only cut one end of a driveline off. If both ends need to be cut, it will definately be a front. These are round though. Where are you guys finding this square stuff? Farm type stuff?? I've seen slip shafts at the John Deere place in town that are splined about two feet. These would make a sweet ass drive line for something with huge ujoints since the material is HEAVY. Ever seen this stuff?