I have an 06 6.0 dually in my shop. i took the heads off to have them inspected cuz fuel was gettin into the coolant. well one head ended up having a crack in the injector sleeve. so i bought one head. well now they are tellin me i cant run an uncommonized head with a commonized head so basically i was wondering if i can do that or if ford is just blowin smoke up my butt. any thing you fellas can tell me on this would be great!!!