67 427/435 won't idle below 1100 and "runs on" after shut down. Mechanic believes fuel from back carb feeding system at idle and power valve may be blown from backfire on center carb. Center carb also has vapor coming from it after shutdown which he says is caused by excess fuel. Wants to rebuild all 3 carbs and put a " power valve block" on center carb which he says will not affect performance.Any suggestions/opinions appreciated. Thanks in advance.
Dave
Dave
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