65 273 Carter AFB won't start

the fact that it runs much better when warm, points toward choke and/or vacuum leak. When it warms up, it might tighten up potential leaks. The Ram forum is full of members complaining about exhaust leaks at the head/manifold surface at cold start up, which subside after the components heat up.
Another thing to consider is the gas. Is the fuel old? Bad gas will make an engine run pretty crappy, too.