Agree with Mitch on the non vented caps. Make sure you have no leaks anywhere from tank to carb.
In addition, my experience is that cars with Holley carbs open element air cleaners evaporate gas out the the float bowls more quickly. Air is always circulating to some degree, and speeds evaporation.
If you know it isn't going to be driven for a while, just connect the two vents tubes together with a rubber hose. BUT.... make certain you write yourself a note to remove before driving.
Last resort would be an air to air exchanger, but that is a minimum $500 just for the exchanger, plus your time to install.
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07-07-2022, 12:22 AM
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