On my 70 L78 Nova motor I had to install the GM heat shield under the Holley Carb also otherwise it would vapor lock and the car would shut down. I also did a 4 core radiator job and run 110 octane race fuel. My temps stay consistent at 180-185 like Jim's.
Rich
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"This is Sheriff Buford T. Justice, I'm in pursuit of a black Trans Am, he is all mine so stay out of the way"
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