Planning to restore my father's '64 Dart, need guidance.

This '64 Dart GT my dad gave me is probably one of my favorite things in life at the moment, simply driving it around is fantastic. I want to do it an honor and get it looking as new as I can manage. However, before I tackle that beast I need to finish my hunt for mechanical parts.

What I need most at the moment is an exhaust manifold as mine has a crack in it, carburetor, new muffler, and a radiator that doesn't leak. Most pressing would probably be the carburetor which, at the moment, needs a few minutes to warm up before it's happy enough to get moving. I have been checking ebay for months looking for the parts I need, but I'm looking to you guys to see if there is anywhere else I should be looking for parts like this? I'm trying to learn myself on a lot of the specifics of the parts I need at the moment, but what I need most at the moment is a carburetor for a 225 slant 6. Where should I go? If I should try locally, I am in Santa Barbara, CA if there is anything around me. Thank you for your help!