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But with the ethanol in the fuel now, the hotter the intake is, the more gas that will evaporate in the carb.

I heard that mopar performance makes an intake valley gasket with the heat cross-overs blocked off. Anyone had any luck using this one?

So I guess that I will be blocking it off later today.

Well, the car is put away around November every year. It never sees snow, so once the weather starts getting cold the car is put away. During a regular summer or 70 degree day, how much longer will it take the carb. to properly heat up if I block the cross-over?

I am curious about whether or not the heat cross-over in the intake manifold is needed? Is it a necessity to make sure that the fuel vaporizes, or is it really useless once the car warms up? What are the advantages to removing it? I have a stock cast iron manifold on my 440.