First thing- RUN, DON'T WALK, AWAY from pensacola diesel unless you want nothing but problems...
2nd- 174 per injector after core at the dealer? Are you nuts? That's $1392.00 at the dealer to get a stock injector back when you've already stated you have no issues with yours.... You'd be spending almost $1400 to get nowhere....
If you can have the truck down for a maybe a week i'd highly recommend GTS...Sure his main job now is selling mortgages, but he's got one of the highest HP 7.3's in the NW at 700+ on spray. He BUILT his truck. He worked for years at Seattle injector building their 7.3 injectors and still does on a part time basis I think which gives him access to their flow bench. Rosewood doesn't have a flow bench...he has a test bench. Realistically, GTS has one of the best options around money wise and quality wise.