It sounds like the
oil consumption may be somewhere else.
When you do pull the engine, it would be interesting to place a bright light in the lifter gallery. Leave the gaskets out between the intake and block, front and back, to allow the electric cord to fit, or whatever it takes. Then snug down the intake with new gaskets. No sealers. Now run a camera down the intake ports and see if there is light shining into the ports on the bottom. You would need to check all ports. If there is no light shinning then the intake is sealing up and that is not the problem. If there is light, then I suspect there is an angle wrong, and it will never seal until it is corrected.
In the mean time, maybe a new set of valve stem seals should be attempted. That might be the sources of your problems.