The Gen 5 blower has a breather port exiting upwards from just behind the throttle body. That's what that 3/8" metal hose nipple is that is sticking straight up out of the blower housing next to where the throttle body bolts on. Normally, you should be able to mount an open element breather filter directly on this. But I don't know if the ZZP SS intercooler blocks off the passage for that or not. It might (you'll have to ask them). If it is blocked off by their IC, then you're going to need to run a breather cap in place of the oil fill cap. And to help prevent blowing oil out of the breather cap, you need to install an elbow between it and the valve cover. GM part number: 12584043 should be for a Series 3 oil tube that has a 45 deg bend in it so it will stick the breather cap straight up and that should help cure most (if not all) of your oil problem. If it doesn't, then you may need a catch-can. But I'm not running a catch can on my turbo application and don't have an issue with the oil dripping out of my breather cap onto the rear manifold.
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[This message has been edited by Darth Fiero (edited 06-08-2015).]