The stock vacsucker is a good idea that was poorly executed, with very poor long term reliability in a performance modded Savage -- such that it causes more (and more varied) running issues than a new person would readily believe on first reading about it.
..... see, I can do balanced when I want to .....
If you run a totally stock Savage you may never find out all the joys of the stock petcock as with the stock restrictive air filter in place it can work for years and years before finally failing due to rubber fatigue.
But if you mod your intake and exhaust systems to get back the 10 hp that Savage EPA'd away from you, then you can read about .......
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=========== how I really feel about stock vac sucker petcocks
.... but let's see how balanced you are when you are sitting by the side of the road trying to get your pisspoorcock to pass enough gas to get you started up again.
.... or have you changing your oil because it pisspoorcocked gasoline down into your sump again.
.... or made you stop at the gas station because you were out of gas again and you find out at the pump you were only part of a gallon off a full tank.