Opening the hood it might look a little intimidating, but its actually more time consuming than anything. I ordered the SHO Shop Shim kit which had all the necessary tools and shims for the valve service. However I returned the kit over a month ago and still have not gotten my $450 deposite back. As far as the front of the motor I would replace the water pump, my previous 2 SHO's leaked around 90K. I was able to get a new pump, all new belts, gaskets, tps, cps, wires, plugs for about $600. I used the shotimes right up, which is good for the tear down, but really leaves you helpless once everything is apart. Do a search, and there is a ton of great info. Things i would make sure to do:
Label all you vaccum and coolant lines
Get a bunch of ziplock bags and put your nuts and bolts in'm, and label the bag were they go
Rotate crank to make sure TB is on correctly (search)
Setup TB tensioner properly (search)
Get the motorcraft wires and plugs (do not use AC Rapid fires, previous owner had them in mine, not pretty)
Invest in a torque wrench
Have a buddy or two around when you go to torque down the crank bolt
Good Luck