Plumbing Question #2 Options

[Porsche Rescue]

Now that I have a handle on Weber fuel plumbing, I am moving on to oil vapor hoses. The engine I am installing is my first with carbs. Can someone tell me what the two small open pipes beside the intake manifolds are for? I assume they are on stock FI engine and I just never noticed them.
I believe I need some sort of vapor cannister (have seen one made by K&N). Do I connect it to the plastic nipple at the oil filler and then to the two nipples at the manifolds? Is this a crankcase vent system? Is there a PCV valve needed? By now you can tell that I'm not real sure I know what I'm doing!

[tryan]

my opinion, put filters on each vavle cover or feed them into one breather canister. hook the pvc/plastic nipple at the oil filler to the intake and jet accordingly. it's always good to keep a vacume on the case. (fresh filtered air into the vavle covers. nasty blow-by gets sucked into the intake.)

i hate gas fumes. i would hook up the charcoal canister as close to stock as possible.

most have three connections.

the tank. leave this one alone.

the air filter/ breather .you will need to have a barbed fitting on the breather/air filter that will not get in the way of your linkage. either side. make sure the hoses are not rotten in the fender wells or rocker panels.

a vacume connection that will purge the vapors while the engine is running ( alot of people just disconnect this stuff, but gas fumes kill me. i'm a diesel lover (IMG:style_emoticons/default/biggrin.gif) )