The drag link was a TRW part #18VTS5237ALL. As far as the Hummer part, that is the lower ball joint. This is an H1 part, prior to GM ownership. (not the GM H2 product) This was a discovery I made nearly 20 years ago. The lower ball joint was scarce and therefore expensive. Figuring a wear part like that had to be common, I went digging. As it turns out, AM General had issue with the lower ball joint failing. As a result, there were photos on the internet of the old ball joint and the new larger ball joint. From the photos, I recognized the unique bolt pattern, went to a Hummer dealer (now bought out by GM), and compared it to my worn one. The pin was the same taper and size, but the bolt pattern was slightly larger, however I could see that some minor redrilling would make it fit. So I converted mine, and everyone else followed. I think I made the guy who had the only ones in stock, a little mad, as he ended up with 4 lowers he couldn't sell.
All the hard parts on the Revcon are custom. For instance, the lower A-frames are obviously welded square tubes. The upper is bent pipe, welded and reinforced. The bellcranks were custom cast specifically for Revcon. (I drilled mine and converted to tapered roller bearings instead of the sleeve bearings.) Steering gear box is Dodge - reverse rotation. The front disc brakes are not Ford, but Ford will work if you have them turned down 1/4 inch. Ford brake calipers will fit the front end. The spindle is not Ford, and no one knows where it came from. It likely was custom cast. Since the guy who designed all this stuff was a racer, it is likely that it was common place to have custom parts built. Front shocks were Carrera, but I retrofitted Koni FSD to fit mine.