Well I'm pumped up about this. It came with a chrome housing and clamp assembly to mount on the steering column. I pulled it out, and turns out that it perfectly fit into the "tach" location of a '54 gmc gauge cluster I recently scored at a swap meet. I was even able to use the bezel that was on the "gmc" plate that fills the hole where the rare option tach is supposed to go. There are two terminals for the tachometer and two wires for the light. Now to find out which one of the light wires is the ground and hook this up for a test. Thanks grin