340 motor pumping excess oil on right side

I have an HV pump on my Eddy-headed 360, and I increased the oiling to my heads to help the unbushed aluminum Mopar rockers survive, and to provide extra cooling to the springs. I can't say it was required, only that I thought it was a good idea.
Well if you look at those heads when installed, you can see where all the oil pools, and especially at the back. I got out my die-grinder and dug a channel back there to help the low side oil climb over to the high side and then drop into the valley. My heads are now side-specific,lol, and I no longer have a PCV problem. Your results may vary.
While the engine was apart, I noticed that junk was accumulating in the pockets,between the lifter bores in the valley. Well I had the bright idea to drill holes in all those pockets and let the oil escape downwards; which I then did, and chamferred them from the top, only. Well; I got an earful from a buncha guys that this would just add to windage and cost me horsepower. If it did, I sure can't tell; it still spins the tires to past the speed limit anywhere in Manitoba,lol. And I don't see junk in those pockets no more.

To the OP
If your guides are passing oil, it will accumulate on the backs of the valves. If you pull the intake it should be obvious. The intakes will be dripping and the exhaust will be baked on hard. I guess you could see this with an endoscope, and not have to pull the intake.
If your intake manifold is coked up black towards the plenum, you probably got the wrong cam for your driving style. That blackchit is a physical sign of reversion, and/or possibly a restricted exhaust. There is nothing wrong with reversion, as all performance cams have some. But that blackchit is carbon and it's hard and the molecules have sharp corners. They won't do your rings any good when they break off, and they can contribute to pre-ignition if they break off at the wrong time. To ease the formation of it,you just have to change your driving style by keeping the engine at a slightly higher rpm, for more of the time.
If you don't see any of that blackchit you got a wiener cam, you need more overlap,lol.