First,
Thanx for the responses. After posting, I did a search, and the responses to SIMILAR questions were to consider the 1/2 shafts...........I did notice NO TORN OR LEAKING BOOTS.
....a worn CENTER BEARING was mentioned....
....worn FLEX DISC(s)....

I am aware of the bearing and discs, and was not able to get that far under the vehicle to inspect.

What is the concensus concerning the single UNIVERSAL JOINT.
Of all the postings that I have read over the years, NOT ONCE has anyone mentioned this item.

The differential mount was the first thing that came to mind, however, I was not thinking of the transmission mount.

If I make an offer, I will bring a set of ramps and inspect the underside with more detail.

Jim, the vibration did smooth out some...........however, the vibration was definately noticible and bothersome even while under heavy load.
Again, thanx for the feedback, and lets keep thoes diesels humming!!!!

Best wishes always,
Spo out.