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No problems with combustion gas (blow by) from the oil/breather cap?
If you have blow-by and how much will be more of a factor of your engine condition than the design of the PCV system. If your draft tube currently resembles a steam locomotive when you're going down the road, this swap isn't going to help that much at all. Adding the valve in the place of an open tube won't fix bad piston rings. Basically, what Ross has done is update his crankcase ventilation system to 1965 standards. It's a lot cleaner and more environmentally friendly than the stock system.
If you have blow-by and how much will be more of a factor of your engine condition than the design of the PCV system. If your draft tube currently resembles a steam locomotive when you're going down the road, this swap isn't going to help that much at all. Adding the valve in the place of an open tube won't fix bad piston rings. Basically, what Ross has done is update his crankcase ventilation system to 1965 standards. It's a lot cleaner and more environmentally friendly than the stock system.
In my case, I don't think excessive blow-by will be a problem. When we put the engine together, the ring gaps were good, the piston clearance was a little on the big side, but within an acceptable range. It's not ready to be bored just yet. (I have another block for that )
I just want to take care of what little blow-by there is.
We have a 1967 Kaiser-Jeep M35A2 with a Continental Multi-Fuel engine. They have a vent below the turbo affectionately referred to as the "slobber tube". My flathead won't be anything like that.