I have just purchased a 1966 GTO with a mild cam and high performance heads. What type of octane booster do you all suggest? I was told about a lead additive that you can mix with your gas. Has anyone heard of this?Also, are the last four numbers on the serial number the actual production number for the vehicle? I was told that some of the first few Goats had the white shifter nob, and the rest had the black one. I am trying to determine which one my car may have come with. Thanks
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