If you intend on running breathers the first thing you should do is remove the pcv valve from the driver side valve cover. At least that's what I'd do. If you don't do that then all you have is one path (passenger side) for the motor to breathe through.
Having an active pcv system allows the motors natural vacuum to remove crankcase vapors. Once you go with breathers there isn't anything to pull that bad air out so it's a good idea to give the motor as many paths for venting as possible. Many will add an oil cap breather to help even with the pcv valve removed.
Unless you intend on running the car mostly for racing or track use, I wouldn't recommend using breathers anyhow.. For daily driver and street use, I really don't think there's any benefit in disabling the factory PCV system in favor of venting the crankcase to atmosphere with valve cover breathers..
Even if the PCV valve is removed by providing 3 paths for venting the crankcase, there still needs to be enough crankcase pressure for pushing the bad air out to begin with, otherwise the majority of crankcase vapors end up remaining in the crankcase causing contamination and eventually shortening the life of your rings and seals..
Remove the PCV valve from the cam cover. The way it is now you don't need to hook anything up the the drivers side cover, nothing is coming out of it. Remove the valve and open up the 710 cap with a breather too. This will give you 3 outlets and it will cut down on the oil mist and smoking. You have so much gas coming out of the one small outlet that it is picking up more than it should. If you run 3 it will slow the velocity/volume. I run 3 breathers and have no issues with dripping or or smoking. You can always mount the can somewhere else or run a tube in place of the filter and route it anywhere you want.
I actually ran breathers for awhile to find out just how effective they were over the factory PCV system and although they prevented crankcase vapors from entering the intake manifold and back into the crankcase itself, I found out through personal experience there was nothing coming out of the driver side cam cover because of the PCV valve not being removed first which only allowed for just one path on the passenger side cam cover for venting the crankcase..
So rather than going through the hassle of uninstalling the driver's side cam cover and then by having to cut open the PCV housing tube just in order to remove the valve and hope that nothing goes wrong.. That was just a risk in which I was not willing to take, therefore being that my car is mostly used for street use and isn't taken to the track anyhow, I decided that it was best to just leave the factory PCV system in place and run UPR's latest 4 chamber design catch can/oil separator instead.. So far after 4 months, the UPR separator seems to be doing it's job quite well..
As for running a breather in place of the factory oil cap goes, I also wouldn't recommend replacing the oil cap unless the breather has a one way check valve for preventing un-metered air from entering the crankcase..
Anyway just my $.02..
