I don't know about body droping but I do know about pto shafts on farm equipment and it would be about the same thing. As long as you have some kind of bearing block holding the unsuported pieces of the shaft I would think you could have as many u-joints as you wanted. But i could be wrong.
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69 3/4 ton 4x4 gmc with 6" sky jacker soft ride. 350 / th350 / 205
work in progress
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