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I would run her good and hot with some seafoam in the oil for a few hours. That may help clean up any gummed up oil passages. Then use a reputable 10-30 or so oil. I use rotella. As it has ZDDP which is neccisary for a mechanical flat tappet engine.
(If anyone wants to argue ZDDP, botique oils, synthetics, or any other thing, please start a seperate thread and let us argue that there. I think we can simply advise the guy on getting the engine running in good order.)
Also, I will second the heads getting done for unleaded. A three angle and some hard seats will put alot of life in an old engine. Check the rockers for excessive wear and play while your at it.
Good luck.
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