So that has to be either an injector that's stuck open or is getting an electrical signal full time keeping the injector open... I can't think of anything else that would do that!
Went back in, and upon second inspection noticed something.. the BWD replacement injectors (along with the Hitachi OEM exact duplicates) DONT come with the 3rd of 3 O-rings. There is the ring that seals intake from injector, injector from top of fuel rail, but there wasn't a replacement O-ring for the bottom of the fuel rail leading to the intake port. Not sure if it was because of this missing O-ring or if the injector actually was bad, but the truck ran like a top after doing so. However, the rich condition caused two other things to happen:
IACV is now clogged and truck doesn't like load at idle as a result - just need to degunk it.
Hard cranking starts when the injector was wonky ended up killing the starter... yippee... Haven't ever even considered looking at replacing this part, so it looks like I'm going to the FSM and to the forum archives.
On that last note, is the starter a job I can expect to do myself in a few weeknights after work? Or, should I pony up the $$ and make it a shop's problem. Looking for advice from those with experience.