If you have the original air cleaner assembly, put it back on and you will get warm air into the carburetor. Make sure the hot air tube is connected unless you have a steel pipe attached to the exhaust manifold choke stove. It may not help with your problem if the engine stalls in neutral. In that case look for hardened and cracked vacuum hoses. Look at the ends of the hoses.
If your power brakes don’t work right, the problem may be a bad booster or check valve.
Check your ignition wires at night by looking for stray sparks. Replace them if the boots at the spark plugs are hard. Float level is important too, as previously mentioned.