Back in the 70's & 80's, the only carbs that would go dry after just a few days were GM Rochesters in my experience. You could only start GTO's after priming the carbs - it was maddening. NEVER had a Mopar with an AFB, AVS, or Thermoquad go dry - even after sitting for a month. My '71 Hemi Charger could sit all winter & it would fire in the spring after pulling the choke, a few pumps to the floor & a little cranking.