I have the ME Wagner PCV valve, and the Moroso "small" separator. As we all know, or should know, if your carb suffers from the "hot idle" blues, the cure is not to open the primaries up deep in to the transition slot, but rather to open the secondaries up a little at idle. On Holley carbs with the little screw under the base plate, that's a PITA. The Wagner valve is nicely adjustable so as to allow you do something similar to opening your secondaries, thus allowing additional fresh air (as fresh as crankcase air is, I guess) without opening up your primaries and botching the fuel/air adjustment. I do both (cracking the secondaries and utilizing the Wagner valve) and it works very well. Here's a pic of the installation. Plumbing it in with a Turkey Pan requires a little bit of effort, but not much.
