I was looking around and found a little soot at the turbo right behind oil line towards the cab there is a flat ring there.Is this a problem?

Hmmm... Exhaust leaks at or before the turbo could spell a loss of performance. After the turbo is too bad but should be still fixed. I would take the time and remove the turbo and look it over careful. While you got it off you might as well clean it thorughly and inspect it completely. Here is the book for the turbo... http://forum.mopar1973man.com/downloads.php?do=file&id=10 (Towards the bottom)