Is this a good donor car?

I am toying with swapping my slant out for a small block. I came across this CL ad . My car is a 72 Scamp. http://cedarrapids.craigslist.org/cto/4245354538.html

Lots of info missing from ad like trans and rear. If you guys could give me some advice and things to ask, I could approach the seller with the right questions. Thanks