I'm even more confused now. My problem is probably that I'm trying to find a logical reason for the finishes from a car building mission which is what GM was focused on. Logically, the factory might "color-code" the clips to help prevent a worker from grabbing the wrong part for the application. In that sense, the comment about the 5/16 clip being the only olive green clip on the car makes sense as no other clip is 5/16. Following that logic, the two 3/16 clips should be a different finish - silver cad? I can buy that. That leaves us with all the 3/8" clips for the brake and fuel lines. Some have the tab that inserts into the frame, some do not. It would make perfect sense to have the ones with tab one color (blue) and the ones without tab another color (black?). Unfortunately, this logic doesn't line up with what Loyd found on his car - mixture of blue and zinc on the clips with tabs. Could a single part number be supplied with two different finishes? I suppose so, but I would think a different finish would require a different part number?
I'll double check mine but I'm pretty confident that the fuel line clips on the rear frame on my car were blue originals with the tab - pretty sure the extra hole is in the frame for the tab. I definitely don't understand the green clip in JKZ27's post that it came from the differential cover - that pic shows a clip with a tab.
I am completely confident that I am spending too much time on this topic
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