I found this was posted in 2015....not exactly the answer to the stock angle but it seems it would give you a correct angle...
If you have a smart phone download the free app called tremec. The app uses your phone as a angle finder, and makes you measure at 3 locations on your drive line. It will then give you your degree that you axle needs to be at for correct drive shaft angle.
looks like its now called tremec tool box and looks like it would do the trick if no one can actually measure the stock number for you...
Lord send your Holy Ghost into our hearts and make the desire of our hearts Your Will.
Pro-choice, that's a LIE, babies don't choose to die!!