On Sun, 2 Oct 2016 08:30:30 -0400, Tekkie® wrote:

posted for all of us...

You think vacuum wipers sucked, you want to experience a vacuum
fuel pump (like on my old '28 Chevy

Never came across one of them. They must have been great while starting.
No problem unless you ran out of gas. Basically a #40 juice can on
the firewall that gravity fed the carb. When the level in the can
dropped, a valve mechanism applied vacuum from the manifold to the
fuel line to suck more gas into the can. When the float in the can
came to the top it switched off the vacuum to the fuel line - repeat
every minute or so depending on fuel demand. (somewhat simplified).
Stewart was one common brand.