When an engine dies suddenly, then lights up immediately, you can pretty much rule out vapor lock. (vapor lock does not appear then disappear immediately.) If the fuel pump dies, assuming it's an electric pump, turning off the power then turning the power on won't fix it. The most likely cause is an intermittent electrical connection. Believe me - been there, done that. my Ford Ranger (1990 also!) started doing that, and it was an intermittent HV wire from the coil to the distributor. It was not secured properly, and wiggled all over the place till it finally developed an internal open. I also had the famous "FORD fuel pump" problem with my Bounder, and gained a lot of experience with vapor lock symptoms.