Spanky,
You are not being politically correct - you're correcting and educating, as usual. Thanks.
I will not be able to get GMC info until late Sunday (from our English-man friend), so I am guessing about GMC's from the Chevrolet Master Parts catalog information and the information provided by 3B.
The roller bearings parts are available from NAPA and can be obtain immediately or in a few days, at most. If the 350 GMC's use the roller bearings (I doubt it), I have those part numbers and those parts are also available.
Finding a military-style (or other style) tow-bar is the last piece of the puzzle in getting that COE from the west coast to NY.
Tim