I have a similar situation (blowby) on my 65K mile stock shortblock. I stopped running breathers to keep that "stock look"... I know, BAD Jay! Actually, I do have the stock breather setup on the passenger valve cover but it isn't venting into the turbo bell. Anyway, mine will lift the dipstick off the tube on a 1/4 pass! I recently pulled a plug from each bank and found a small amount of oil on the threads of each plug. Plugs looked great other than that. Am going to do a compression test one of these weekends... no access to a leakdown tester.
I am also wondering how an intake gasket could do this? You see, I had a guy port my intake years ago and he hogged it way out... very little material left between the ports. I was concerned about it, but don't see how that would cause these types of symptoms unless it was blown to the valley, not between ports, right?
Oh yeah... I am running dual steel shims with GE1200 and ARP bolts torqued to like 105 psi. NO coolant loss; no smoke during normal driving; some smoke at WOT, but may be the blowby combined with my leaky rear main dripping on my crossover, because it doesn't happen every time.