500 mile check, decided to drill.
Well, after about 500 miles, I decided to scrap the breather filter and install the Rx clean side separator I had purchased. I was seeing a little bit of oil misting from the breather filter. It wasn't dripping or anything, but I'm kind of OCD when it comes to this kind of stuff. The truck had been idling and running fine, and I saw about a 7/10 mile increase in my mpg's on the tank I ran through (I know one tank is subjective, but my mpg's have been pretty consistent on my 87 p/t tune). I installed the Rx clean side separator per the Rx install instructions, tapping into the filtered side of the stock air intake box as the fresh air source. I did go ahead and order a new stock air intake box (top only) from Tasca for about $45 shipped so I can still return to stock very easily.
In the 500 or so miles, I caught about one ounce of a thin brown liquid with a very pungent odor. It did smell of gas. I also noticed what appeared to be a slight drop in the level on the oil dip stick (as carefully as I could guage - as we all know that story). The dip stick definitely did not reak of gas as much as it had been before. I had been watching this pretty closely as I had started to see the level increase slightly and it was smelling more and more of gas.
I guess I was expecting to catch a little more than what I did, but it has been extremely hot here over the last couple weeks. I'm wondering if drawing vacuum off the driver side only is enough. I will continue to monitor it and see if I catch any more once the weather cools off a little bit. Based on the small amount I caught and the misting I was seeing from the breather filter, it makes me think the crankcase is pressurizing more under boost than what the vacuum from only the driver side can draw out. I just don't want to have to drill the passenger side for additional vacuum. It also makes me believe that T-ing off the driver side to provide the clean air source as some have suggested isn't the best way to go as this is only reducing the amount of vacuum. I was seeing a lot of blow back through the clean side into the driver side turbo inlet with the stock PCV set up. Hell, who knows, it may just be better to run two cans and use a clean side separator as the fresh air source.