Trying to figure out how to hook up a PCV valve of a '68 327 sb 210 hp with a 2 bbl carb. Right side valve cover has elbow coming out but when I look at manual and parts books there is no connection for hose at air cleaner. Any ideas or photos that you can help me out with?

 

original 68 camaros didnt have pcv valves in them.
they had a tube from the rear behind the intake with a hose going to the ground

 

in other words, a draft pcv system. The engine gases were removed during driving through suction created by the wind going past the tube.

You can just run a hose from the valve cover to the vacuum port, just realize you might have problems getting it to idle as that's when the most vacuum is applied to the hose (other than during engine braking) and you might not be getting the carb to pull fuel down through.

 

Putting a PCV valve in one valve cover and running a hose from there to the base of the carb (full manifold vacuum) or to a vacuum port on the intake manifold, is how a conventional PCV is hooked up. Idle won't be affected, nor will the engine's vacuum level or carburetor draw. Be sure to install a breather in the other valve cover, or in the case of the 68, in the intake manifold oil fill tube. Then you can cork off the draft tube if you want to.

 

Thanks for the replies. I have found out a lot about the PVC system over the past few days. They were mandated by the Feds for 1968 but were around since the 50's but not widely used until they were mandatory. Prior to that time they were simply ventilated out the bottom.
I have found most of the parts that I need online but still need to located the inline flame arrestor. Any ideas where to find it?
Thanks

 

Just reading through and following this thread.

Chuck, I noticed that my PCV valve is hooked up to a full vacuum line on the carb. My PCV is an elbow style inserted into the left valve cover.

When I pull the valve out and block the base of it with my thumb....I notice that my idle drops. Does that mean that my carb may be running lean? Should the PCV valve not retsrict some of the vacuum to avoid running lean?

Vic

 

The way you have it hooked up is right, and what you tested is normal. Keep in mind that the PCV valve isn't drawing vacuum from outside (atmosphere) air, it's pulling out crankcase pressure. Plus, full manifold vacuum drops as the carb opens up. That means when you're loading down the engine with a heavy right foot (drawing the most amount of fuel and air), the vacuum level to the PCV is extremely low, or none at all. The PCV won't be leaning out the fuel supply.