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daveinhelena
Guest
I have added a 600cfm Holley carb to my '72 350 motor. It seems to be excessively rich. I have leaned it as far as it will go with no real change in the mixture and vacuum pressure. I assume this is because I reside at 4500' above sea level. I am thinking I need to rejet for my altitude but wanted to check in and see if I missed something more obvious. The engine has a new cam and headgaskets.