I just saw that this was a old post.

But , I am planning on putting in a catch can for my engine's tappet cover breather and also for the engine block's breather pipes. I will then put a small filter on top of this catch can so that it can still breath instead of breathing into my intake manifold(the tappet cover breather pipe) and breathing into the aircleaner box (the engine block's breather pipe).

Now my question, Is there any benefits of doing this?
Basically I noticed once how much smog and oily fumes comes out of the tappet cover breather pipe when disconnected and thought that this stuff will make my intake ports dirty and sticky. Will it not be better not to let this stuff get into the intake system?
I presume eventually because my car's carbs mix fuel and air it will "flush" away all the stickyness inside the intake manifold and make a little more power and breath nice clean air.

I am just too positive? Must I leave everything as it currently is?
Thanks