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Vac tree?
https://www.slantsix.org/forum/viewtopic.php?t=28151
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Author:  Bren67Cuda904 [ Mon Mar 31, 2008 8:18 pm ]
Post subject:  Vac tree?

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.

Author:  70valiant [ Tue Apr 01, 2008 3:27 am ]
Post subject: 

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

Author:  Charrlie_S [ Tue Apr 01, 2008 3:42 am ]
Post subject: 

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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