Thanks guys,
looks like its a 930 turbo motor from a 82.
Here is a link I found with all model year codes:
http://home.arcor.de/s-g-e/911dat.htm
I don't want to open up the case to see what's in it until I'm sure if I want to rebuilt it. But it has been converted to NA.
My next question would be what would this motor be worth after a rebuild or in its present condition?
Currently cylinder two is dead. I may pull the head and check to see if it's a valve. All other cylinders have good conpression.