Well, I posted the 1970's Toyota and Datson, might as well go with a Honda too. Which would you pick? No Reserve: 1978 Honda Civic CVCC Wagon 4-Speed for sale on BaT Auctions - ending April 23 (Lot #144,231) | Bring a Trailer
Out of these 3, I'd take the Honda, even though it's the smallest. The best DEAL though, might be the Datsun.
I'd pick the Datsun, because it can get converted-over to using the sedan's independent rear suspension. The Honda's CVCC carburetor is suppoosedly a pain in the posterior to service. If normally carbureted or, better yet, fuel-injected, it would be an almost impossible choice to make, between the two