help with cutting out ride!

I have a 1980 2.3L Stang, It only has approx. 30,000 original miles on it, never drive it, but it started cutting out and dies at about 35 mph. I've had the Holley rebuilt and plugs and wires changed but it still does it. I even went with some advise about cutting the catalytic converter off and that didn't work. Can anyone help this illiterate fool of automobiles?

cutting out ride!

It does start right back up, but also if you catch it fast enough and put it in nuetral you can save it. I had a fella messing with the timing, unfortunately Auto Zone had 3 different settings, which none seemed to be right. But the more we advanced the timing the better it got. The weird thing is if you hold the brake and floor the throttle it will spin the tires without cutting out. It's weird. I really need to get the thing going, they say it's a limited edition, the only thing limited right now is the miles on it Does have a brand new fuel pump the carb. was rebuilt the filter air/fuel was replaced.