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  1. Engine, Transmission/Axle & Driveline/Axle
    Hi. I have a Ford custom 500 1965 with a 289 small block. What I can tell is The motor original, Im running it with 20w50 high zink oil. Problem is that when Im adjusting The carbonator I hear a Kinda loud knocking noice when i reach about 700-800 rpm and when i turn it up to about 1100rpm...
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