tach testing

[GoMangoBoys]

I want to test my tach before it goes into the car.  I would hate to have to pull it out later.  Can someone tell me how to wire it up outside of the car.  I can connect it to a different engine if I know what each connection is.  I know I will need 12V, ground and the negative on the coil.  Not sure which terminals to connect these to.
Thanks

[Skdmark]

12v to the long stud
Tach wire to short stud
Housing to ground

Image is Cody's from another thread.

[greentween]

At this stage, you may want to consider the RT Eng tach board. Especially If you want to add a CD ignition. With an MSD or Pertronix digital box you need that board for that tach to work. When you replace the board, you can tell which of the 2 posts are for the 12v and the coil via the instructions from RT Eng. His board also allows you to calibrate it.