HOW IMPORTANT IS THE PCV VALVE ON MY 1970 318LA?

[temsinc]

The PCV valve on the valve cover on my 318 is not in play. I'm running 340/360 Eddie aluminum heads, air gap intake, Eddie 650cfm carb. The valve was never in play when I purchased the car. If I do not need it, can it be removed and that open port plugged or try and put another breather on that side? The valve itself is a real bitch to try and remove, I recall there is a lock pin on the valve cover that has a good strangle hold on the bottom of the valve. Anyways, your input is much appreciated.

Darcy

[HP2]

That's not a pcv valve. Its simply a breather that appears to be taped off to avoid blowing oil out of it.

I'd recommend removing it, installing a grommet that allows you to install a pvc, and then route the hose to the associated port on the intake or carb.

[70chall440]

The engine needs to breath. A PCV allows the engine to recirculate gases where as the breather who have shown is passive and allows pressure to escape, the taped up nipple would normally have a hose going to the air cleaner where air being drawn into the carb can pull crankcase vapors back into the engine to be reburned,

You can run a simple breather that vents to the atmosphere (your engine compartment), I would recommend running one on both sides, or you can run a catch system that includes a catch car and is connected to both banks.

Bottom-line is that you need ventilation at a minimum. 

[temsinc]

Just to confirm, I could pull the vent and replace it with a breather similar to the K&N breather on the drivers side? Will this suffice? Or, do you recommend what HP2 advices to install a PVC valve and run it to the carb or intake? I am trying to research where to install or run the hose from the PVC to the 650 Thunder Series carb... .

The only thing I don't like about the breather on the drivers side is that I get a bit of oil that occasionally drips down from it onto the header and plug wires...oh, and the crank case gases, which I think smells like the best cologne on the market lol....

[Bullitt-]

here's a decent deal on what I think you need https://www.ebay.com/itm/332559528525

[temsinc]

Thank you Bullitt! 

[Burdar]

I am trying to research where to install or run the hose from the PVC to the 650 Thunder Series carb...

There should be a large nipple on the front side of the carb.  That's where the PCV hose should run to.

[temsinc]

Would it be the port that the arrow is pointing to in the pic?

[Strawdawg]

Yep

[Topcat]

As an option:     

There are numerous PCV oil catch cans available.

Basically an oil separator just like what a compressor uses for air tools.

Check out Jegs or Summit for these if you want to consider adding one.