Early postwar cars are great hobby cars. Plugging into the right owner group is critical, and I'd suggest subscribing to a publication like Hemmings Motor News (yes, I work there, but I think you'll find unbiased sources agree with me) to find parts and services specific to whatever you end up with. I would be inclined to suggest a 1946-'49 (first-series) Dodge or Plymouth. They're rugged, reliable cars with great parts availability and a low buy in. They even have a great online presence thanks to http://p15-d24.com/ Good luck!