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Praxiss454 · 07-28-2016, 02:57 PM

Okay I think I figured out the manifold vacuum part from my shop manual. I believe I am supposed to unhook the line from the PCV on the top of my valve cover which goes to a port directly underneath the carb on the intake manifold. That must be the place I hook up the vacuum gauge to rather than the venturi vacuum port on the carb that goes to the distributor advance.

TJ's Chevy - thanks for describing the baseline mixture I should start with, that was another question I had.

07-28-2016, 02:57 PM	#130
Praxiss454 Registered User Join Date: Jun 2016 Location: Novato, CA Posts: 519	Re: Newbie thinking about diving into a '65 GMC 1000 Okay I think I figured out the manifold vacuum part from my shop manual. I believe I am supposed to unhook the line from the PCV on the top of my valve cover which goes to a port directly underneath the carb on the intake manifold. That must be the place I hook up the vacuum gauge to rather than the venturi vacuum port on the carb that goes to the distributor advance. TJ's Chevy - thanks for describing the baseline mixture I should start with, that was another question I had.