3/4 Ton Rear Shock Mod/Accessory Identification

[BFoley]

Working my way front to back on my truck doing routine maintenance, I figured I would change out the front and rear shocks. Getting to the rear, I was a little surprised when I took a closer look at the "coil-overs". At first, I though it was some cobbled-up mess using exhaust clamps but when I took everything apart, the setup looked to be some sort of coil retrofit kit.

50% of me says leave them off, but 50% is starting to like the way they look. Any idea what these things are? I have been unable to find anything online. If they were a legit accessory, I might re-use them. What say you, 60-66 brethren?