2.0 Crank & Head Venting Issues Options

[tjtryon]

Car: 1973 2.0 with dual Webbers

Issue: I have a leak from the drivers side valve cover, and poking around, I know my crank & head venting is not correct, which may be what's causing issues. I wanted to fix this first, before I change the valve cover gasket.

I have what I believe is the CB breather box already on the car. It has a hose connected to the oil filler area, one to the fan shroud, and one that is venting to atmosphere.

I have a hose port at the base of the carb intake manifold on both sides, that does seem to vent air out. I assume these are the head or valve cover vents, but am not sure. Additionally, nothing in the system seems to pull vaccuum, unless the fan shroud vent does so.

I have 3 main questions: What are the hose ports at the base of the carb intakes (front of intake on drivers side, rear of intake on passengers side)? What's the correct routing of the hoses? Where does the system pull a vaccuum?

Many thanks in advance!

[stugray]

I do not vent my heads.
I use the stiock breather box only and increased the size of the vent line and run it to a aftermarket breather box on the firewall (no drain back to engine).

I have never had to empty the collector on the breather box but the engine is a relatively new build with 1-1/2 race seasons on it.

I have zero oil leaks and no problem with the valve covers.

I glued my cork gaskets into the valve covers with Blue RTV (the ONLY PLACE I use RTV on this entire engine any more) then installed them on the engine with a light pressure from the bales (didnt click them all the way on).
I left it overnight like this.
Then I removed the covers and put a very thin coat of blue RTV on the outer (mating) surface of the cork gaskets and let it tack up but not dry.
I then put a coat of oil on the head mating surface and installed the covers.
I have removed/reinstalled the covers more than a dozen times and never had to replace the gaskets and never had a leak.