My car aparently vapor locks whenever hot. I can stop go in a store, and when I come out the car refuses to start. Only after popping the hood and letting the motor cool for five to ten minutes does the car finally start. I replaced the factory fan with a high flow electric fan recently and the problem seems to be worse. I thought about putting one of the later model fuel injection blowers on it (I have the parts). The car is a 78 and has a vented hood.