Engine jet Boat

jet boat engine question?
I have a 69 396 chevy jet boat engine. On one side the breather has tons of oil blow by. Does worse the more rpms I push. I have changed the gaskets because they were old, and also put baffled valve covers and breathers on both sides. whats wrong what should I do.
Sounds like you have bad valve seals, this can be confirmed by a leakdown test. Escaping gasses are pressurizing the valve cover chamber, causing the blow-by. Time to have the heads rebuilt.
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69' Schiada Flatty engine start













































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