Re: Power valve?
Take it out and plug it. It does not affect idle or transition to the booster. Yes it works on engine vacuum ,but it only richens the mixture when the vac is low and the engine is pulling fuel thru the boosters. You should bump your primary jet size up if you do take it out. on our 585 we usually go 76 pri and 78 sec. 396 motors 78 pri and 80 sec.
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