Insulating Against Heat on the Carb

So I will revisit my question one more time from previously, is the thinner Edelbrock heat insulator gasket (0.32" or 5/16", whichever) better than a slightly thicker (1/2") wooden or phenolic spacer? I see a lot of good ideas, but didn't really get an answer to this question. I appreciate all of the input to this discussion.