Drained about 4-1/2...5 quart jugs of fuel/oil mix out of engine block. Suspect injectors letting fuel in all the time? Any one else had this problem?

 

you mean out of the waterjacket area? or just when changing oil out of the oil pan...
I suspect the later...
I would suspect injectors first off but there's thru-fittings in the head that could be the culpret too although unlikely. A crack in an internal injector line going from the feedthru to the injector could be to blame as well. In essence, any where fuel is present that a leak would allow it to go into the oil, is a potential spot to look at.
[ nice avatar pic Hiram ]

 

Just when I dumped the oil. I have already pulled the fuel rail and getting ready to pull the injectors & internal tubes for replacement. [ thank you ].