Re: Ventilating the Flat Head!
I'll throw another clinker in here. I've got an early intake manifold on an 8BA block in my 39 and the only place it breathes is through the filter on the oil fill cap. I've been running this for approx 20 years and the inside of my engine is as clean as the day I built it. Absolutely no sludge build up. Not even a hint. And it doesn't stink.
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