[jhv48]

Is this a new problem that just started? Has the car been running fine up until lately? When the engine quits after running for a while, can you see fuel in the sight glass of the float bowls? If not, it’s a fuel delivery or vapor lock problem. Try a phenolic spacer under the carb to isolate some of the heat from the engine. If there’s fuel in the bowls and it won’t start, then it’s a heat related electrical problem. Most likely the coil or MSD box.