I'm hearing two different stories. Does the throttle body on a '74 2.0 have one or two vacuum ports????

I looked at a late 74 TB, and it only has one vaccum port in the rear.
It may be one of those early / late model year things.

some with one, some with 2...

My understanding is that the '73 had two .... one port = vac advance 2nd port = vac retard. Somewhere after the '73s were produced, the engine gurus decided the advance was not useful, so they eliminated it. The workers, for a short period of time were still connecting the green? hose up the the advance side of the vac pot, but it was not connected to anything.

until dec 73 production two after jan 1st 74 production one