I found this web site to be an excellent reference for your question. I could not have done the work without it!
http://www.ford-trucks.com/article/article.php?id=281
Best of luck!
Well,for those unfortunate people like myself that have to change the plugs on one of these,you have to pull off the doghouse inside the van,then the fun starts.With a quarter inch ratchet,and one or...