[Mike C]

There are no "wide ratio" and "close ratio" SM465 trans. They are all wide ratio. The BW T18 has a wide and a close but not the SM.

Your best bet for a donor is a blazer or suburban as they aren't typically driven as hard as trucks are. Especially true of 3/4 and one tons. And I would certainly try and get a trans/t-case combo still bolted together to make sure you have all the parts you need.

SM465 were used through '91 in Blazers, Subs, and the square body trucks. But some of the later ones use a slip yoke on the 205 and not the bolt on u-joint with slip driveshaft which is what you want IMO.