I've installed and/or replaced a few in-coil airbags, like pictured. The abrasion from the coil spring can wear them out.
Are you thinking of these for your 80? I think they are not such a good idea in that application. Maybe for a stock truck, to increase load capacity for towing, but not for a lifted "adventure" truck, requiring articulation and reliability. (IMHO)
Installed on a vehicle with leafs, however, I've heard and seen good stories more frequently than bad, with most failures being from improper (or no) air pressure, improper install, overextension, etc. Once in a while an unexplained failure, but not commonly.
I used a set on my old 1985 G20 (Chevy van) with coils in front, leafs in rear, and it really helped the worn-out suspension. It was a crutch, however, and I should have just replaced and beefed-up the stock suspension parts. I was always checking, adjusting air pressure, inspecting...it was a headache.
Hope this is what you are looking for...
Last edited by njtaco; 11-11-2006 at 04:31 PM.
03 Taco (Gone, and missed...)
88 FJ62 3FE, auto, etc. Sold
07 DL650, lightly farkled