I took my 69 Mach 1 Mustang for one of its periodic rides last Sunday. After 4-5 miles, while running at hwy speeds, the engine gradually lost power and died, necessitating a coast to the side of the hwy. Ended up towed back to my garage. Of note, essentially the same thing happened a few mos. ago. That time, after sitting for an hour or so, the car did start and I was able to drive it back home. It was a hot day, and I thought maybe it was vapor lock. So I put an insulating wrap around the stock metal fuel line from the fuel pump to the carb. Obviously, that did not fix the problem. Additional info: stroked 464 CI CJ motor, stock Holley carb that was rebuilt by Year one,aluminum intake, stock Carter mechanical fuel pump. Car had never done this before recently. ?sound like a fuel issue? could it be a dying/dead fuel pump? Other thoughts? All help appreciated as I figure out whether to try to tackle this myself or have it towed to a mechanic Thanks!