Brainstorming ideas for coolant crossover on Air-Gap intakes

I don't think you need to actually heat the intake that much. If you can keep the carb warm, and get the fuel to stay in the aircharge, that would go a long way.
I had a 340 once that gave me trouble.I coiled a brake-line tube around the center pair of primary tubes, and connected that to an unused manifold port at the front of the AVS carb.That solved my winter driving problem.This engine did not have the AG. I think it was more or less stock.