I gotta agree, don't get rid of vacuum canister (ball thing). I couldn't wait to get rid of mine, went right in the trash during tear down for new motor...then I had to go get one again. Only thing I would suggest is relocating it or upgrading to a steel or aluminum one. Although that's another $50-60 added onto build cost. So my vote is to keep it. Just a helpful little component to store vacuum in case you lose some on intake. Only vacuum I am running is brakes, pcv valve, vacuum advance distributor and the heat & a/c controls, but it can't hurt to keep it.