Installed a 'B' manifold on my new engine to get the bugs out before I go back to my 3X2 setup. I need to hook up a vacuum port for my PCV sys & wondered if I can use an open 1" spacer instead of a 4 hole spacer? I want to run it with a 4100 carb until I get the 3X2 ready. I also have a Holley 600 that has a PCV nipple on it already but would rather run the 4100(less trouble). I will admit that this engine really likes that Holley carb.

Dan      Kingman Az.      86409