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if you functionally don't want it then just unplug it from the vacuum source. if you don't want to see the canister or any remnants it existed then you'll need another distributor.
Why do you think it's the vacuum advance? You said you adjusted the timing. What was it timed at before you changed it? Maybe your initial timing is off now. Just plug the vacuum hose and see if it runs better before you go and buy a new distributor.