I'm thinking two heads are better than one. While the operator is making a couple of hard runs through the gears you can concentrate on what's going on under the hood. You can put the gage on the dipstick tube, but I have the feeling you'll see for yourself the breather(s) being pushed up off the valve covers. AFAIC this is a straight forward blow by issue -- you've eliminated everything else. How much you can tolerate is up to you. Using two breathers might mask the issue, but it certainly won't fix it.
I really don't see how you can avoid re-honing and re-ringing the engine. Trust me, I'm in the same boat as you, but right now I don't have the time or money to fix it.
