Anyone install Edlebrock aluminum heads ?

i don't think you'll see any horsepower increase with the airgap. Some heat is required to vaporize your fuel for better mixing.Start up and warm up will be adversely affected with the air gap.
I’m not looking for horsepower from the air gap. It’s the only intake that deletes crossover that I’ve found. And I’m not using tin cans, lol ! I don’t drive it in the winter. Crossovers kill performance when it’s mildly warm. It’s the main reason fuel boils in our carbureted vehicles. Amongst a few other factors. If I can improve keeping fuel cooler. It makes sense to me. It’s so bad with carbureted vehicles. The fuel starts to boil when it’s a little over 80 degrees outside. When that fuel boils over into your intake. You lose power because of flooding, poorer fuel economy, difficult starts.