I might just try new Motorcraft fine wire if 632FM at Autozone correct. $4.59 vs the Autolites XP 104 at Advanced for $6.48.
I've been watching the Ford Enhanced PID's ie low count and the high count are starting count. If you remember at 15000 miles my back plugs started count and I swapped the frt/back banks and the counter diminished. The ground electrodes platinium dot was almost gone on the back bank's negative firing plugs.
I am noticing the small throttle openings the response is less. Be interesting to see how the fine wires do perform.
I'd check the coil current draw but lost access a very fine clamp meter for dc current it even had a chart recorder. It's amazing what good accurate test costs. Ouch!
Wasn't even in budget while I was working!
Paul
