92 Dakota Sensor Identification

I pulled the motor on my 92 Dakota, 5.2L last week. I was just checking everything over before I dropped it back in and I found this sensor hanging. It was near the back of the engine compartment near the firewall. It was apparently damaged when I removed the motor. The wire connector was still hooked up but the other end looks like it was broken off of a mouting bracket on the side. It doesn't look like it goes into anything but then I guess it doesn't make sense to me what it is sensing. Does anyone have any idea? I need to replace it and don't know where to start looking. It's approx. .75" diameter and has an overall length of 12".
http://i27.tinypic.com/b6zgjm.jpg
http://i26.tinypic.com/rbek1y.jpg
http://i25.tinypic.com/6dtuvo.jpg
http://i31.tinypic.com/b69avp.jpg

Crankshaft position sensor.

It looks broke where it bolts on it might hold with a large washer. I doubt it runs without this unless you installed a scrap yard motor with on already installed.