Engine will not idle now , stalls out

Thank you both Murray and 1 Wildrt, for your thoughts. I was thinking Carb which is a Holley 4 barrel , from what I was told by a rep. from Holley carbs, the numbers on the unit worked out to be a 600 cfm unit used on a Ford product. have the carb about 10 years had a fresh rebuild when I picked it up at the Mopar show in Carlisle Pa. What throw me a curveball was the static sound out of the radio, But I really think you are correct.

Any thoughts if I should try to rebuild this unit [ not sure if I can still get a rebuild kit] or go with a new unit and which Brand would you use, When I use the carb. calculator it worked out to a 650 cfm unit for my 318, which has Keith black pistons, #167 .030 over, and a comp cam 20-223-3, xe268h hydraulic lifer, with ITT headers.