Dual exhaust one blows hot the other cold ?

78 F-150 400 facing the motor the left bank blows cold out of the exhaust the right bank is normal trying to find answer,running headers no leaks on exhuast if you know the answer or any suggestions please let me know.

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C If there is no crossover and your hands are at some goodly distance from engine there should be enough heat at both pipes to be Quite uncomfortable,assuming the carb(s) are operating properly and in sync. Carb problem or bastard intake manifold? B
chuck wrote:

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