What parts from a 70 1 ton Van work on 67-72

[JimmyFloyd]

Ok, so my grandfather has a 79 van he has been using for storage. Hasn't moved since I can remember, but was told that it had a rebuilt motor before it was bought. it's a 1 ton, Dual rear wheel. I know it doesn't have a tilt. What parts should I look to use off this? It's a little rusty, so it probably will be scrapped once I get what I want off it. And this probably won't be for a while, but just want to prep.

Thanks.