Interesting. Id say you had a culmination of a couple of problems. The warped yokes may have been contributed to by an out of balance tailshaft. If it is out of balance, and undiagnosed, then as many replaced yokes and uni's are not going to fix the problem. This will, in turn, cause vibration problems further up the drive train, with bearings and gears not running true.
As for the blown motor, when you say you replaced the engine, was it a 2nd hand motor you bought and installed without checking anything, or was it a motor that was reconditioned/rebuilt. If so, and it was a turbocharged motor, was it rebuilt using non turbo parts. If it was an off the shelf, second hand motor, god only knows what life it had in the hands of the previous owner. Id say, unfortunately, you are the victim of some bad luck, or worse, someone a bit unscrupulous, who sold you a dud engine. In all the time Ive dealt with 2.8's, ive never heard of one killing the crank. They are, generally, a pretty strong motor, given the normal maintenance required of any diesel motor.
As for selling my Rocky quickly, I doubt it.

Growing old is compulsary, growing up isnt, and
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