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  1. Spider - 105 & 115 Series (1966-1994)
    I just recently rebuilt a Datsun L20b in a 76 620 pickup (my parts getter). It's a flat tapped engine, cam on followers, and my machine shop said I needed to use oil with zinc added to prevent camshaft wear. He also said that the most recent spec motor oils neutralize zinc additives if they are...
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