Intake manifold choices

I have been running an Edlebrock Performer RPM for some time, always with the same problem. This area does a 'fuel change' twice a year with a change to 'summer blend' around Memorial Day. That causes a problem when an 'unseasonably' warm day comes around in April or early May. The vapor pressure is SO low for the winter fuel blend, a warm day gives me hot-soak problems and sometimes boiling fuel.

Headers are ceramic coated to reduce heat. I have a cool-can...but keeping ice in it is a PITA.

Does anyone have experience with Edlebrock's 'air gap' intakes enough to say they definitely work better than a 'plain' manifold? Seems a given, but input from some that have tried them would be good to hear. It would be about $1000 to change to an air-gap, so it's not a pocket-change situation. IF I had a pretty good idea that an air gap would make a definite difference, I'd give it a shot.

Got stuck yesterday with a 'no start' flooding issue after my third 'hot soak' stop of the day. It's a bother.

Thanks.