Ford Spark Plug Problems?

I just did the job last week on an 03 E350 box van I have. The engine was acting up a bit at 48,000 miles so I dove in. It's a tough job, especially hard on the passenger side. Access much more difficult on that side. The two hardest plugs are the second and third on the passenger side as you look under the hood. Your gonna want a beer after doing those. I would advise anyone doing the job to review some of the really good youtube video's.They have some real good tips. Snap-on makes a spark plug socket for just this engine. It's about 6 inches long and it holds the plug in with a nice snap when it's seated right. A few important points. Get some extra long zip ties. Use them to support and pull the wiring harness gently out of the way on each side. It's especially helpful on the passenger side. Do use compressed air to clean around the plugs before removal, and then again after you remove one. Use Motorcraft plugs(platinum) only no Autolite. If your coils are good replace the boots-get them from Napa. Put silicone grease on the end of each boot. The boot has an arrow on it that you match up to an arrow on the coil. Don't fail to do this or it won't go in right. I used a very small amount of anti-seize and torqued them to 23 foot pounds. There is no way those plugs are good for 100.000 miles. Mine at 48K had the gap way over spec. Hand start the plugs in the head only to avoid cross threading. You can feel when it's going right. Since I had the front all apart, I was going to do the idle pulley, belt, and tensioner, but held off and will do all that when the water pump goes. I would say that unless you have good tools and good mechanic skills, it may be worth it to give Ford the $500. Mine turned out good and is running like a champ.