Larry,

You might be right about the 144 degrees. I will have to do some serious thinking about it.
Are you sure I have to remove the camshaft? I did a valve seal replacement on a 190D many years ago and I don't think I removed the camshaft. Its been a long time ago so I can't remember for sure.
Any way, I thank you for your replies and with your help I will eventually get this figured out. When I get the valve cover off maybe I can figure it out by the valve action.

P E H