Yeah... but it'll definitely be worth it. Especially with the new shocks and springs. btw, what shox and springs are you getting?
Also, get 2 new Toe-Link-Compensators from ford. they're expensive, but, the job really isn't done w/out them.
If you want to go ALL THE WAY, you'll need to get some new rubber bushings from MOOG (i think) for the inner bushings on both the upper and lower control arms for the rear. Last time I checked, there weren't any poly for those 2. However, I've talked to a few guys who said that those inner bushings don't really need to be changed b/c they're very strong and don't see much wear. I had to have a guy at the Ford Dealership take out and put in the inner-bushings on the upper control arms for the rear. He said he used an air tool (I didn't have one). I tried to take the old ones out with a small press, but I just ended up bending the control arm.
Also, you could look into welding in some extra pieces of metal in that upper-rear control arms in an attempt to strenghten them.