I have the EGT probe in and will be making an 8 hr trip to Tennessee this Friday so I'll be able to get some readings and normal running temperature. I did end up putting it in the manifold as that was the most common spot in all the how-to youtube videos I saw. Plus, its easily accessible from below but should be safe.
Here's some pics. I used a hose clamp to help keep it in place, although the screw-in plug did seem to hold it so its just a precaution. Notice the drill bit tip I melted and the tap I destroyed. The dewault bit, however, did the business.
