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Reply to "Tuning Holley 4150 650 DP #4777-3"

fuel has alcohol and other corrosives additives in it. try adding a few ounces of MARVEL mystery oil to your fuel, when it is going to sit . I regularly add to oil and fuel ... seems to help with vapor lock here in the desert.
Holley also makes a rubber flapper check valve that replaces ball / retention strap.
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