stock 1973 318 V8 starts but won't idle without foot on pedal

Even after it is warmed up it will die if I take my foot off the pedal. I'm doing a lot of work on this Dart to sort it out after a 25 year storage. New spark plug wires got it running but a a trip to my modern car mechanic did not solve the startup issue. They timed it and adjusted the choke. My diagnostic skills under the hood are not good. What steps can I take to identify the problem and make this car run smoothly?
I have done some significant repairs to the front suspension and transmission with help from this forum!