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Customer q:

This is a question about the Holley 4175 carburetor #0-80555C. In the Holley manual, the vacuum port call-out for the #4 port in the front says "purge" so can I run the gas tank vent line to it? My Holley mechanical fuel pump does not have a provision for this vent line, so I need to know what to do with it. This engine is not for street use, and does not have any emissions equipment. Thanks


ac = No

drivewheel = 2WD

engine = 350 V8

fuel = Carburetor

make = Oldsmobile

model = Cutlass

pwrbrk = Yes

pwrstr = Yes

trans = Automatic

year = 1976


If you have a vented gas cap, you will just plug this vent line. If venting is needed, it can be hooked to the base of the air cleaner or simply tucked aside in the fender well area. You do not want to hook this to a vacuum source on the carburetor. Let me know if you have any more questions and good luck.

Holley 0-80555C
‍Vacuum Secondary 650 cfm Carb Universal for 1965-69 GM applications only. Will not fit Ford or Mopar applications

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auto car parts help
Posted on
May 10, 2018
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