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

jmanhoff said

So does it make more sense to run the VA on ported vacuum or manifold vacuum? Or is that really dependent on how the engine reacts to each?

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I would run it whichever it runs best on. Some people insist on one or the other, but I wouldn't box myself in like that. Usually, lower compression engines with lumpy cams react better using manifold vacuum. The extra timing pulled in at idle and part throttle helps for a complete burn and keeps the plugs clean. Whichever way it runs best is how I normally do it.