Fine Tuning a 360 Magnum with a Brawler "Double Pumper"

TT5.9mag said

Ok that cam should have really good signal. Read; vacuum. So your numbers should be close but 24 at idle is a LOT and should go up in cruise not down.

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Alright, I would imagine most gauges if they were off by a couple inches of vacuum would still change the same amount. I’m going to hook up the other gauge to the carb and let it idle and compare, and then I guess do the math to see how much it changes between cruise and idle and give a better number