BMiller85
Newbie
Same, almost need to just go to an auto parts store and compare em.It is certainly possible. The spark could be shrouded a bit from being recessed.
Could be the lack of EGR needs some supplemental tuning as well. I haven't run into that before. Two changes at once is not an ideal situation to diagnose. I would definitely take care of the spark plug reach issue first.
It could be difficult to find an AC plug that is short. I haven't seen any publications that list overall length.
REALLY wish I could just use the regular AC Delco's. I talked to my guy and he said they're all gapped to .35 as they were from the factory, so very well could be it.