05-23-2021, 02:42 PM
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CC Member
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Join Date: Apr 2009
Location: Little Rock area,
AR
Cobra Make, Engine: ERA Street Roadster #782 with 459 cu in FE KC engine, toploader, 3.31
Posts: 4,533
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Not Ranked
I followed it up until about the late 70s when I realized at least one good thing about unleaded was the plugs and oil seemed to stay clean longer so I figured I could start stretching out those 2000 mile intervals longer.
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