Holley 750 big rear vacuum port plugged?

[AlaskaJeff]

IF my car doesn't have power brakes is it OK to cap off the big rear vacuum port? Or should I run it to a valve cover breather?

 

[abdywgn]

or use it for pcv valve

 

[64mopar]

Cap it or run it to a pcv.
Connecting it to an open breather will cause a vacuum leak.

 

[AJ/FormS]

I recommend NOT to use it for the PCV; in my experience, it made the engine idle funky. My guess is the rear cylinders ran a lil lean.