The two issues are the heat soak from the exhaust, and the heat soak through the inlet manifold. If it's cross flow at least the exhaust is on the opposite side to the carb. If both on the same side you'll need a heat shield between the two manifolds. the heat proof gasket is very important, so look closely between the carb body and inlet manifold. It may not be easy to see what's there but if in doubt fit a thicker gasket and consider a heat shield under the carb to deflect rising heat from the block. You might also consider wrapping the manifold although I'm not really a fan of that option.
