When during all this did you disconnect the ammeter, before you posted your question?
Please hook it back up or at least connect the two wires together.
Then would you please look at the drawing that Willie posted with the wiring diagram and you will see how it fits into the whole cars electrical system.
I'm sorry if this is going to confuse you but there was a wiring change in 1929. Before that coil did not read on the ammeter.
Unless your car is for show, and you have a slant pole coil please use Willies drawing and wire the ammeter the way it shows on the drawing. Having the coil read on the ammeter will help future trouble shooting of the ignition system as you will see the opening and closing of the points when starting the car is all is good.
http://www.fordbarn.com/forum/showthread.php?t=97192