Percolation? Heat soak? Don't drive during summer??

yellow rose said

What you need is the Cool Carb heat shield. Google it and you’ll find it.

There are two parts to it, but you can just use one. I always use both of them, because it’s relatively cheap.

That carb has issues with heat. I always block the heat crossover in the intake manifold because you don’t need the heat in the first place, and it pisses the carb off in the second place.

That and the Cool Carb heat shield is the best bang for your buck.

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I tried every heat shield, spacer, and other gimmicks. None worked and I lived in Vegas at the time too. When it's hot there, it's otherworldly. Plus it's bone dry, so stuff evaporates near instantly.

@DentalDart, I would definitely see if you could borrow a holley style carb from someone and see if it changes much. Other than that, I'm not sure what more you can do.. I was going to add a hood scoop just to help ram more cool air into the engine bay, but went efi before that could happen. I wouldn't recommend efi unless you want to spend a year tinkering after every drive.. It takes a bit to get it tuned in.