73 Duster, mild '70 340. I've run a ThermoQuad on it that DemonSizzler originally set up for my failed 408 stroker. I've had no problems with idle or anything until recently. Car runs and drive great except when i pull up to a light...foot off the gas it idles but seems to cut out or drop out every 5 seconds or so....kinda makes the whole car hesitate for a second and makes you think "if it keeps doing this, it'll die"

It hasn't yet but somethings making me think the carb is loading up or something.

I thought about leaning it in some with the screws and at one point decided to run them in completely...I noticed this did NOT kill the motor..that made me think it's the carb as well.

Timing checked out good at 8 degrees advance and it's solid too. the motor has under 1,000 miles since the rebuild.

Any ideas on this?