Crankcase ventilation with a Supercharger. What should I do?

Leave the PCV valve functional as it was stock you need it, if you have a A-Trim kit it comes with with a hose with a inline filter that goes to the filter box from the valve cover, or cap off the nipple at the TB and valve cover and run a open element on the valve cover.

If the pcv is left hooked up, and the throttle body/valve cover lines are capped, then you will pull in unmetered air whenever you have a vacuum in the intake. Not sure how much of a problem that is however. I'd try that first - cap t/b and valve cover nipples; leave pcv hooked up (will it withstand your boost pressure? Some have mentioned using Thunderbird SC pcv for that reason); put a breather on the valve cover. If you don't want the mess that a valve cover breather often makes (oil mist over engine), then you could run the valve cover vent to a plastic catch can (speed shops sell 'em) and then run the other catch can line to the inlet piping of the supercharger. THe catch can should catch any excess oil keeping it out of the inlet piping. Definitely don't do away with the pcv without venting the crankcase - crankcase pressure will blow oil past seals. Lastly, you said "Ok, I see how unmetered ir can enter a n/a engine. I thought it would suck in air from within the crankcase somehow, lol I didn't really put that much thought into it." That's exactly how the unmetered air enters. Normally that make up air would be provided by the little hose that runs from the throttle body to the valve cover - after it's been metered by the maf. But when you block those nipples off to keep from pressurizing the crankcase with boosted air, you eliminate a metered source of make up air for the engine.

Blackfox, you have some blowby. Leave the PCV hooked up and do like Micheal says with the bottle and a hose if it's too bad. When I first got my '93 I was blowing a quart of oil out the breather every 150 miles. I ended up routing a line from the valve cover to a windsheild washer bottle from my '69 stang. I drilled the top and put my stock PVC into it and it worked pretty good as an oil / air seperator. Knew the bottle was full when oil started streaking up between the fender and hood. Sucked, but it was a 75 mile trip to work each way each day and I had to deal with it for two months until I could redo the bottom end. Found two pistons with cracked and blown out lands and three intact oil rings. The rest were broken up from running 87 octane with a blower on '93 hyper psitons...

Jamie