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Bill OH · 11-06-2021, 11:40 AM

Some thoughts: How about plugging the windshield wiper port on the intake or has the connection for the vacuum gauge accomplished this? Does your intake have defects in the exhaust heat cross over? You can remedy that with core plugs in the block cross over ports within the block. Your manifold new or used? If all of the foregoing proves satisfactory and Charlie’s GM distributor does not correct the problem, which I hope it does, then pull the carbs and have them rebuilt by Charley NY or install Stromberg 48s with 48 jets and perhaps lean the power valve and send the existing carbs back to the vendor. Holleys are not top rung for me. I have used 48 carbs and they performed very well. You have the displacement and cam to take advantage of 48s. Another thought: Use a bored out Merc manifold mounting a Rochester 2GC!!! Your call!!!

11-06-2021, 11:40 AM	#43
Bill OH Senior Member Join Date: May 2010 Posts: 454	Re: Lean MisFire Some thoughts: How about plugging the windshield wiper port on the intake or has the connection for the vacuum gauge accomplished this? Does your intake have defects in the exhaust heat cross over? You can remedy that with core plugs in the block cross over ports within the block. Your manifold new or used? If all of the foregoing proves satisfactory and Charlie’s GM distributor does not correct the problem, which I hope it does, then pull the carbs and have them rebuilt by Charley NY or install Stromberg 48s with 48 jets and perhaps lean the power valve and send the existing carbs back to the vendor. Holleys are not top rung for me. I have used 48 carbs and they performed very well. You have the displacement and cam to take advantage of 48s. Another thought: Use a bored out Merc manifold mounting a Rochester 2GC!!! Your call!!!