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post #1 of 3 (permalink) Old 02-09-2018, 08:24 PM Thread Starter
 
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Vacuum

I've seen in pics of Pontiac engines, that one of the bolts that holds down the carb. to the intake, I think maybe the passenger side front or rear, is not only a bolt but also a source of engine vacuum. Apparently this bolt is hollow and I've seen vacuum lines attached. I think I've seen this on mid 60's engines. Would anyone know if this was also possible (source of engine vacuum) on a stock '71 intake with Quadrajet carb.?? Thank you.
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post #2 of 3 (permalink) Old 02-10-2018, 05:18 AM Thread Starter
 
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Speaking of vacuum, could someone confirm that on a '71 GTO with factory a/c, the source/supply of vacuum for the heater/ac interior control panel, is a black hose with white stripe and the hose for the hot water valve is a black hose with red stripe. I found non 1971 pics and this is where I got my info from. I'm thinking it is probably the same for my year. Why would they change it, but then again?
Thank you.
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post #3 of 3 (permalink) Old 02-14-2018, 07:20 PM
 
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You can buy the hollow stud. I got mine from Pontiac tri power. I believe that you can get it from Ames and others.

I'm not sure if it will work with the Q jet? Check it out.
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  Pontiac GTO Forum > The 1964-1974 Pontiac Tempest, Lemans & GTO > 1964-1974 Tempest, LeMans & GTO Engine Tuning and High Performance

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