[BLACK AND BLUE 67-72]

I had a problem like this, I would start the truck and it would run fine for a minute or two then act like it ran out of gas and die, I could pump it and it would restart and do the same thing over and over. I replaced all of the fuel lines and it would still do it, I got a wild hair one day and took off the air breather while it was running and looked at the choke butterfly and it would start to open too soon and the truck would die, so I bent the choke rod so it would stay closed a little longer. It fixed it and I haven't had it happen since, so you might check that also.