I’ve had an issue w a 2-Holley 94 intake on an Offy intake on my ‘49 V8 Ford Flatheadp. I couldn’t get the idle up high enough without leaving the choke open slightly. ( I bottomed out the idle adjust screws). I believe I traced it down to a vacuum leak from a the threaded vacuum port on the Intake centered below the carbs. It appears someone made a home made vac nipple for a PCV valve tube. Looks like a short pc of 3/8 or 1/2 “ threaded rod drilled thru. Seems like the wrong thread used & nipple too short also/ not right size for hose either. What is the correct size for that vac port threaded hole to take a correct nipple or Tee toI seal up vac leak?
The Jalopy Journal
