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Follow the adjustment page for proper modulator adjustments.

If not, check the white vacuum switches located on the top of the valve cover, blocking each one off to test for a vacuum leak.

assuming your engine cooling system is not sufficient.

The gauge's needle should jump up to 15" - 20" of vacuum.

You can also get a prebent vacuum modulator line, looks like you need one of those also in your one photo.

While the phase-in began in 1969, it was not complete until the 1973 when the Powerglide fully phased out.

At least I think it is called a vacuum line Do I need to run a hose from the gold looking thing with the green square to the hole on my intake with the red circle? Also make sure to put a bubble on the end of the metal line the first step of a double flare, or just use the flared end of a pre flared tube.

I don't know Holleys well enough to tell you which is which.

NEVER buy the rubber tubing that goes first on the roll, and last to be sold; it's wrapped very tightly on the roll.

I will make a set of stand-offs and mount it about 1" off the inside of the passenger side frame rail, with the 4" vertically aligned and the 11" length parallel to the framerail.