what phenolic spacer for eddy carb to stock 273 intake?

Moroso used to sell a heat isolator that was 4 aluminum plates and 5 gaskets (4-hole), worked like cooling fins. I ran a 1406 on a Wagoneer that had crazy underhood heat issues, and this solved 90% of my hot carb blues. Blocking the exhaust crossover in the manifold helped a lot as well.