I have my fuel shutoff using manifold vacuum.
since I deleted my vacuum pump, my shutoff and other accessories use manifold vacuum, hooked up where the vacuum pump used to exhaust into the intake.
my electric vacuum pump just powers my brakes.

this of course only works if you have the butterfly flap in the front so vacuum exists.

check the link in my sig for pictures.

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1977 240D auto w/OM616.916 engine
2005 Matrix 5spd
2006 Prius

https://photos.app.goo.gl/AdP7i8xfCJeFuk5y9

glass pendant necklace http://glasspendantnecklace.com

fused glass pendant http://fusedglasspendant.com