I've been wondering about these points myself after reading the reasoning for the rear slip yoke at that link. I don't think I've ever had or seen a torqueflite tailshaft housing crack in all these decades of messing with Mopars so that doesn't ring very credible. I'm sure it isn't impossible, maybe Roland will have some additional insight on this. The possible downside it seems to me of having the slip yoke in the rear, is that it is now way out there at the end of the shaft, so after the wear to the slip yoke and the dings and arrows to the tube of a few years of driving (as in typical 4 wheel drive shafts with a few years of service), would this placement exacerbate any wobble? I do see the attractiveness of using this to make it a bolt in replacement. If a regular slip yoke works on a tail shaft which originally had a B&T setup, one could simply come up with a complete used Mopar shaft of an appropriate length, unbolt the B&T flange, and use the late model shaft, skipping the expensive modified shaft; I don't think this is the case though I haven't ever tried it.
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