Heat soak? Edelbrock carb & air gap

I don't get it
I have a Holley 750DP on my 360 on top of an AG. I run un-wrapped TTIs and aluminum heads . The water temp is a minimum of 205. I run the HO Carter pump with a 3/8 steel supply line, all the way into the tank. I run 87E10 exclusively.
I never ever have these kinds of problems.Not on the hottest days of summer nor under any kind of operation. Mind you we rarely see more than about 100 degrees in the shade.
I think I will get me an Edelbrock just to see what all the hullabaloo is about.
My answer is borrow a Holley, see what happens. Holleys have the bowls hanging out in the wind. And a great accelerator pump system.

As for me, I would not be looking at the fuel delivery system nor to the fuel. And with the AG, I find it difficult to think it might be hot-fuel.
But to prove it either take the hood off for a tankful, or pop the hood every time you park it. Time will tell.

Here is another thought; perhaps your engine is creating more heat than it needs to. Late timing will lead to the A/F charge not finishing it's burn in the cylinder. Then it may continue in the headers. The headers have no water jackets, so the heat goes into it's surroundings. I big cam will do the same.
If your engine is sucking hot underhood air, what would you expect. Take the hood off for a tankful.
Now here is the biggie;
If your supply line is within a few inches of a header pipe, move it! I put mine inside the frame all the way to the pump. I strapped my engine down and ran a really short rubber jumper across the gap. Insulation does very little when nothing is moving; it gets hot like everything else. Hot gas can flash to vapor as soon as it drops into the bowl. The sudden pressure change causes it to boil instantly.