Hot start problem

Hard restart after a "hot soak" -- meaning the engine is hot, and fuel returned to the fuel tank is also hot as a result (this vehicle has an older fuel system that is not "returnless") can be caused by a weak fuel pump -- as one suggestion. When the fuel cools, the fuel pump begins working again. This is classic for fuel pumps of that era. Now, this concern could also be related to ignition control, so I don't want to say anything for sure. Perform a check of fuel and spark when the problem is occurring, and proceed down the proper path.