I'll grab some dye and try it out as well.. I did buy a cheap little borescope for my tablet.. So i'll test it out and see how well it works when I get it.
Hope it works better than the one I bought, if so, post what it is and what software you used.
FWIW- lots of leaks end up on the bellhousing. It took three cans of brake cleaner to find out my valve covers were still leaking.
I never used anything but dry gaskets, the thick Felpro fiber ones.I had good luck for a long time, and then they leaked. Now I am using the old school orange rubber Felpros, but it took some black Felpro RTV to seal the corners up.
I have heard all PCV's aren't created equal. I have a factory looking one on there, but no idea if it's working right, besides it rattles when you shake it, or the right size. Running a breather on the other side.