Originally Posted by Racer
You must use a PCV valve if you are connecting the covers to the engine inlet (vacuum source). The PCV valve has no effect on the brakes.
I'll second that. If the PCV valve is removed, you will have a massive vacuum loss. If it makes your brakes worse (?????) then maybe the whole lot is plumbed up wrong....?
Brake booster should go to a manifold fitting, PCV from the rear of the RH cover to the lower carb fitting, and form XC on, hose from cap on front of LH cover to SIDE of aircleaner housing. Pre XC just had a breather cap, or, is that pre-'75...?