Problem Running

First off,

I got this car in an effort to learn how to build cars. I have a 70 Dart /6. I can get the engine running (after some effort) but as soon as I let off the gas, the engine dies. We checked the gas pump and fuel filter and they are both allow gas to get to the carb. Any off the top of your head ideas from the gearheads? Also, I have the standard 5/8" sparkplug socket, and it is not grabbing the sparkplugs to remove and check them, and unusual socket required for this?

Thanks in advance,
Author: admin