Rocker shaft oil
#22
The notch at the end of the shaft is facing you on the right head, back side of head on left shaft. As far as running synthetic these engines where built before synthetic tolerances, they like regular dino oil and the heavier the happier they are. Your cold oil pressure is below spec, should be a tick under 40psi at 2500 rpm engine at temp.
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jjh221 (07-07-2020)
#23
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