[twobjshelbys]

Do you have an electric fuel pump with a switch on the dash? I was having similar intermittent problems until one day on the way home on the freeway the car stalled like yours. I had a fuel pressure gauge and could see I had no pressure. I checked the fuel pump but it was too noisy to hear, and went to the front and started jiggling the switch and I could see it come on and build pressure and figured out it was the switch had developed a flat spot. (And yes, it was a Lucas switch.)