Did you get this job done? When I did my heads on my 97 4.6L I basically had to touch everything you'll have to and there are 2 special tools that they recommend, one holds that cam shaft and the other is used to turn the shaft. I live in Canada and to buy both from a jobber was going to cost $200.00 plus, so my buddy and I made them (he has a welder so it was pretty easy). I did mine with the engine in place, it's not a quick job and involved lots of beer.
Bill