Thanks for the input Bert.
Small confession to make... When this leak happen, I continued driving without stopping to see what the problem was.
I figured i would try to make it home and stop if the guage or light indicated it was overheating. The gauge got up to normal and stayed there for the rest of the drive which was about 8 miles/20 minutes. The temp light came on a couple hundred feet from my apartment so i continued to my parking spot. However, when i finally looked under the hood, I found the temp sensor on laying on the valve cover so I guess the guage and light can't be trusted at this point.
I want to make sure the engine doesn't need new rings or something else before I jump into a manifold change.
I forgot to grab a new rad cap on my way home from work so i didn't bother trying to start the engine today. Hopefully tomorrow.