He seems to get a hold of new vehicles that are damaged beyond what could be sold as "new". So he dismantles them and sells the parts. He once had a complete SSR body that had damage to one side (from what I couldn't say), but he wanted over 12 large for it. It did have the entire interior though.
As far as the LS2, I have given it some consideration dropping that into my Silverado! Biggest headache is whether I can simply drop the standard 4.8/5.3 PCM and wiring harness onto the LS2 (are all sensors the same?) and get the PCM custom tuned? I already know I'd have to swap the electric throttle body for a cable operated one, but that's not a big deal.