I like Coca-Cola in the Red cans, but for some reason I might make it a DrPepper job. Just sounds really Shade Tree.
For the Plugs, I might see what SparkPlugs.com suggests, but I might also see what the Ford parts department comes up with. This big complex motor is no place to pinch pennies. Story: Few years ago, AutoZone was promoting BOSCH, and it seemed like a good product. Neighbor's V8 Chrysler blew the whole center out of one. There it was, from center electrode up, still attached to the cable. That one came out in seconds with an EasyOut. Then our V6 Ford van, ran rough coming in from a trip. The part of the insulator IN the combustion chamber had broken off. Fortunately, it rested against the ground electrode and nothing fell into the chamber. I bought a set of MotorCraft platinum plugs from the dealer and they're still in there.
God Bless, jd
2003 Jayco Escapade 31A on 2002 Ford E450 V10 4R100
Ford says double-platinums. Autolites generally work well in Fords. But as I found out, Iridium plugs work even better than than double platinums. I fully expect to get at least 120,000 miles out of this set, even with my aggressive programming.
PS - my brother put some Bosch +4 plugs in his 5.4L Expy. One burned through, damaging the main wire harness in the process. Turns out this issue isn't unknown with Coil-over-plug ignitions. So I suggest avoiding any designs besides the recommended single-electrode like the stock plug.
2000 Ford E350 DRW Wagon (14-pass all captains chairs)
V10 w/ Banks PowerPack, Diablo Predator, 4.56 LS, ~350,000 miles
New Desert Fox in the works!
Always replace plugs and boots together. Replace before 90000 miles to keep the coil pack from having to work to hard because of worn out plugs. Coil packs run from $60-$100 dollars to replace. That is up to thousand dollars wasted.