Allyn,
Go with the Motorcrafts. I just did mine about a month ago, and it would not have been too bad a job, if I had had this information before hand:
Glow plug removal:
This is a straight-forward service. After removing the valve covers and unplugging the glow plug(s), loosen the glow plug a couple of turns (10mm deep socket, 1/4" drive). Then push a 4-6" piece of vacuum line over the end of he glow plug and use the hose to unscrew and remove it. Use the hose to install and screw in the glow plug, then tighten with the socket. The socket will contact the rocker arms if used to remove the glow plug.
That alone, would have saved me about 2 hours.
We did take some pictures for a DIY article, but I don't believe Bill has had a chance to complete them and post them in the WIKI, yet. You might PM him for what he does have: CHPMustang