The power stage is black, about 2" high, 2.5-3" long, and the actual body of it is maybe3/8" thick. It is screwed onto an aluminum heat sink with two screws that is in turn screwed to the fender with two screws. It has a single stack 7 row connector that goes to it. The connector should loop down from the edge of the fender and come up into the power stage. On your turbo car it is located behind the airbox on the drivers inner fender well. Testing it will be a bit of a pain in the ass because unless you have a know good tester you need to pull it out of there with the harness on it so you can test it.

Testing it is pretty darn simple, you want to see that you are getting a pulsed signal into it from the EZK control unit on the gray wire pin #5 and that you are getting a pulsed ground signal out of it on the red/white wire on pin #1 headed to the coil. You should be able to do this with a simple test light.

On your dist. the red wire is power in, the black wire the ground and sheilding for the other wires, and the blue wire is your speed signal going back to the EZK control unit. It should be a simple 5 volt square wave signal. A lot if times on those distributors the black plastic housing that secures the wires disintegrates with time and the signal wire starts to ground out and then nothing runs. If you have not removed the dist yet I would avoid it until I had to, once you break that connector you will have to remove it and get a new one. Rule out the power stage first, you can R&R it and test it without risking breaking it. Besides if you pull the power stage out and see that you have no flash going to it then you will know that it is more than likely that dist and if not the you're going to need a power stage and you can put off that dist repair for a little bit.

Mark