69 Dart Hard to Start When Hot, Starts Fine Cold. Vapor Lock?

Check here to see if there is a station near you

Pure-gas.org - ethanol-free gasoline in the U.S. and Canada

Then run the tank down to nreat empty and fill it up with alcohol free gas.

If it is a fuel vaporization issue it will go away with no alcohol in your fuel. If not then some other issue