There's a bit of information here I find questionable and not well advised but I don't want to detract from CDA's great attempt to be helpful. Regarding Ford Modular Motor plugs.........
1. The issue of ejected plugs seems to be more of a head defect with the threads were cut. Installation (from factory or as a maintenance step) OR removal when NOT DONE properly can lead to thread damage and the ejection. This problem was more prevalent in the earlier years and before the PI (performance improved) heads were added to this family of motors. That doesn't mean a blown spark plug cannot be induced with poor installation and/or removal. To date no one single cause has been shown to be why plugs are ejected
2. Using nickel-based anti-seize is advised as it prevents the steel plug from seizing in the head threads. This greatly reduces removal effort and in its own way is a defense against difficult removal during the next replacement.
3. The 2 valve head plugs should ideally be changed at about 50K miles using the Motorcraft SP-479's. Any other brand has been repeatedly shown to be problematic on FTE--in a way this doesn't make sense yet it does seem true if we're to believe anecdotal experiences with more than a few reporting plug problems after changing them.
While its claimed plugs will last 100K miles that's just not the case in my experience. They've worn enough at 50K miles to warrant changing them. There's not a monumental improvement in performance with brand new plugs but fuel mileage improves enough to offset their minimal cost.
4. Torque to 25 ft/lbs with nickle-based anti-seize---no need to reduce that torque just because anti-seize is in place. The plug threads when properly cut and plugs installed correctly will withstand at least 90 ft/lbs dry torque as shown here: https://www.ford-trucks.com/forums/1...ead-heads.html
Interesting read to be sure.
5. Ford Modular Motors with the 3 valve heads NEVER found their way into the E-Series at any time during its life from 1997 to end-of-life 2013.
As a suggestion to CDACamper if you post photos during your process it greatly aids the description. After all a picture is worth 1,000 words.
Great effort though---'taint easy sharing such a process.