If you're having issues with heat soak flooding the engine or draining the fuel bowls as fuel expands or boils, try a phenolic spacer under the carb if you have the room.
I use this one, but you can get them shorter, or as a thin plate. Obviously the thicker it is the better it will isolate the carb from engine heat and heat soak. Also when I replaced my intake manifold gaskets I run the restrictor plates in the exhaust crossover. I probably should have blocked the crossover off entirely, but thought some heat might be good as I do tend to run early/late in the season with quite cold air and water temps.
http://www.summitracing.com/parts/mor-64930