Here are pics of my distributor that I can't get out of my 4.9 inline 6 F150 engine. I have taken 3 different pics of the same thing, just from different angles.

I labeled where I found a hole that I found a hex wrench fits into, but it doesn't seem to do anything when I turn it. And I also labeled the normal distributor hold down bolt. (when I remove it, nothing happens, I still yank on it and I can get it off.)

http://loopfuzz.com/images/f150/pic2.jpg

http://loopfuzz.com/images/f150/pic3.jpg

http://loopfuzz.com/images/f150/pic4.jpg

sorry for my bad text writting.. not easy to write with a mouse.