Found this cruisin' on Epay. 400412329076

Dan      Kingman Az.      86409

This is the PCV port to which I refer....



its right out front on some manifolds, tapped for the screw-in valve - or an elbow

 
 Steve Metzger       Tucson, Arizona

I hate to disagree with a member who has provided such great information and innovation to this site, but I'm pretty sure that is not a PCV port due to the fact that the manifold is for a '54 or '55 Ford or Mercury teapot carb with the choke mounted on the side of the manifold. No PCV valves were offered in those years as the crankcase was vented to the atmosphere through road draft tubes. Please correct me if I'm wrong.

Marc

'54 Merc ragtop

Pt Townsend, WA   

                                                                                                                                   

That picture looks just like where my PCV was on my 2 bbl truck manifold.

Kenny  Onalaska, Texas

I agree - its an early manifold - but the hole is correctly located, drilled and tapped........just like for a later model truck that had the PVC. I don't know the exact manifold application shown - the four teapot sized bore holes and choke are indeed from an earlier era - the port could also be for a brake booster for all I know. But the port has the right set of two small holes drilled into both sides of the "cross H" manifold which would work just fine for a PVC set-up.

 
 Steve Metzger       Tucson, Arizona

That port is the access point for vacuum to the hydraulic/vacuum brake system on big trucks of the mid 50s.I guess it was possibly for the power brakes on 54-56 cars.

 

Paul,

Boonville,MO