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Old 03-01-2013, 05:38 PM   #3 (permalink)
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Usually any line that has a high vacuum at idle is good. As long as your show a vacuum at cruise that goes to zero at full throttle you probably can use the gauge as it is just a relative indicator of engine load.

The power brake line is a good source but I usually refrain from cutting into that line in the interest of brake reliability.

Look for a line that goes into the intake manifold some place rather than into the air body.
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