Thanks for tagging me guys. Sorry for your loss Jasonsdad. I'm sure it was a great project for you two.
Like Zed Head stated, start by taking and posting pictures of the big items. I'd be happy to take a look and try to help you sort and speculate on the value of the parts you have left. Unfortunately, this area isn't exactly full of Z cars, so the potential market for heavy items becomes very small. I've seen local S30 parts sit on Craigslist for months due to the lack of local buyers. In this part of the country as you are well aware, rust claimed most of the Z's, but the powertrains mostly survived. I have about five L28 engines myself. The problem is that it's cost prohibitive to ship heavy parts to the Southwest where they need good engines and transmissions. Hopefully you find the right local buyer that is in need of what you have.
PM me and I will do what I can to help.