Hard start when warm

For hard start when hot. I'm reading fuel percolation also. At hot engine switch off todays corn based fuel boils and floods it. 30 minutes or more allows the excess fuel to completely evaporate. There are mods that help. Rework the fuel line, thickest carb base gasket you can find. SlantsixDan might chime in with more info.
About that wire from ignition switch to the hot in run portion of fuse box... Below the steering column is a white harness connector with 4 or 5 large gauge wires, red, blue, brown, yellow, black. You might find the black one failed there, melted connector, etc... It doesn't normally fail inside the fuse box which is a good thing.