My new 390 Holley has no port for hooking the PCV hose. Right now it is simply disconnected. I have a threaded port in the number 6 intake runner and a tree with two small taps.(1/4 and 3/16?) I am considering changing out the tree with something that has three ports, but I wondering about that cylinder leaning out with all the crank case gases going only to that cylinder. I this the problem I suspect it will be?
Or I can remove my 1/4" carb insulator now that the intake is not heated and find a spacer and drill and tap the port. Maybe for that matter, drill and tap the intake on the driverside horizontaly straight in.
Your thoughts please.

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67Cuda,FAST EZEFI,340cu,CR=10.25,RollerCam&Rocker (XR268HR,#20-810-9)(#1622-16)(EddyRPM#60779,#7576), (MSD6AL,#6425) A904, GearVendorsOD, 8 1/4,3.55:1, ClassicAir

I drilled and JB welded a port into the carb adapter for my clifford.

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Do not connect the pcv to a runner. You can use a spacer under the carb, or possibly drill and tap into the plenum of the manifold.
PS: my 390 carb has a PCV port.

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Charrlie_S
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