Actually I already have the rear disc set-up, but I need an extra set of upper links as a back-up in case i don't like the TriLink set-up I just installed (because you have to take the bearings out of the upper links with the TriLink).
The local scrapyard has an early 1st Gen with the rear drums, so if those links are interchangeable with my 85 rear disc set-up then I'm in business.