Looking for a running /6

Hello! I am on the search for a running 225 slant six replacement for my 72 valiant. Looking for a running slant six for cheap. Just need to get the car back on the road. Located in SoCal. Or if anyone can suggest a good machine shop that does good work I am willing to do a mild rebuild for the current motor. I'm new to this whole thing and think I would enjoy rebuilding my slant six but I don't have a lot to spend. Anything helps! Thanks!