I don't think it's possible to test them in the car. If I'm wrong someone will point it out. A hard start hot condition often means the carburetor is too hot and is boiling gas out of the bowl into the intake runners, creating a rich condition (think trying to start a hot engine using the choke). It's possible your heat riser is stuck in the 'heat on' position. The condition is fairly common in the 216 but I don't hear about it much with the 235. Someone will be along soon with additional ideas/information.

@tiny What is the condition of the coil? When they fail, they make the engine hard to start or not at all when hot. Dirty points can make an engine hard to start as well. Just some ideas that I hope will help.