It's pretty easy, don't try it by yourself though. You will need some extra hands when trying to get all the bolts back through the holes. Make sure you support the axle when you do the uppers, or you will never get it back together. (learned from experience) Took me and a buddy about 4 hours to do it.
Crystal White 98 Cobra [email protected]
Steeda G-Trac Stage 3, Steeda U/D, Steeda Tri-Ax, Steeda T/A, UPR power pipe, Perf Dist Screamin Demon Coils and Live Wires, FRPP Alum d/s, FRPP 4.30's, DR Gas off road X, 2 Chamber Flows
I don't know how much it would cost to get installed. I did all 3 stages of my Steeda setup alone myself (except for welding in the subframes). If you do it yourself though, make sure you use jackstands! Don't trust a jack with yer life. I don't know about your car, but mine's only got about 4 inches MAX of ground clearance....no way my head can even fit under there. And like psikillz said, removing the old bushings for the UCAs is a serious pain in the A$$, and big time consumer (was for me anyways). They're supposed to be able to be drilled out easily...but that isn't always the case.
Its really not a hard mod, you just need to be careful with the springs and supporting the axle.