I don't know if I have all of your posts pertaining to this, but from what I gather you have overhauled the engine. I believe even if it had a fair amount of taper the new rings would seal up the cylinder enough to not be the problem with oil consumption. I have known professional mechanics that put rings in a motor with .030 taper. I would not do it myself, but the engine ran for a number of years without excessive oil consumption.
I would be leaning toward the PCV valve. You said previously that it was not attached to the valve cover. This was probably not by accident. I would disconnect the hose from the valve cover and vent the fumes to the atmosphere, as God had intended.
