Hello. Just recently joined. My buddy and I are building a C20. (Among other projects!) This one is my wife's dream vehicle.
We already shortened it and are lowering it now. Converting it to six lug. Replaced the rear with a modern 8.6 10 bolt. Replaced pretty much the whole brake system and most of the suspension. EVENTUALLY it will get LS swapped. Not in any hurry to do that. The ZZ3 crate motor and TH400 work fine. when those go out, then we'll swap. Will acquire a motor and cam swap over time.
I theorize the truck was a dedicated camper rig. Was pretty well cared for. Felt bad cutting it up. (not too bad to do it!)
Here is a link to the flickr page for the build
https://flic.kr/s/aHBqjzK1qC