Ike,
Brake lights: First, to simplify things, remove the plug from the inside master cylinder. It's a redundant switch system that is really unnecessary. Check that the wires in the working plug are connected as shown below. The wires can be switched by inserting a flat jeweler's screwdriver from the plug end.
Speedometer: You will need a reverser that goes somewhere in-line between the trans and the speedo.
Tach: The green wire (#6) should be live with the ignition on, and the orange wire comes from the distributor as a signal. If you are using an MSD, the signal will come from that somehow.
Wipers: It sounds like the connections at the switch are incorrect.