Lets play a game (ignition question)

[N2TRUX]

Ok, lets play a fun little game of "What did the dumb @ss blow up". It real simple. I'll be the dumb @ss, and you be the contestants trying to guess what I blew up. Be forwarned though, there aren't any lovely parting gifts for the loosers.

The scenerio goes like this. I bought a factory "tach" gauge cluster for my 77. I plan to have it restored because there is some fading on the gauge faces. I wanted to verify that everything worked before I called to get an estimate on the restoration.

I hooked everything up, but the brown "tach" lead wasn't long enough, and didn't have a plug on it. I used a jumper with alligator clips to reach the tach output on the distrubitor. Everything checked out good.

I asked my buddy that was helping me to unhook the jumper so I could pull the "tach" cluster out, and put the "non-tach" cluster back in. While putting the non-tach cluster in, I turned the key on to move the shifter down for clearance. When I did smoke rolled out from under the hood.

Since the tach lead is ground, I can only assume that my jumper must have landed on the positive lug on the firewall. The end result is my truck won't start now It turns over, but it won't start....

So what do you think I blew up?