I just replaced my balancer last weekend and it only took about 2 hours start to finish.
I got an OEM balancer from Autozone for $102, dont buy the cheaper ones! This is to important of a part to go cheap on.
Heres how its done.
1. put the car on ramps or jack stands in the front
2. drop the spoiler in the front
3. loosen and move your belts out of the way
4. loosen the fan shroud both top and bottom, then from underneath the car lift up the radiator and fan shroud to have easier access to the harmonic balancer, there is no need to drain the radiator if you just lift it a little to move the fan shroud
5. remove the four pully bolts and take off the pulleys from the harmonic balancer, dont forget to keep them in order
6. tricky part: you can use a 1/2 impact to remove the balacer bolt, just wedge it in between the fan shroud and hb.
7. most harmonic balancer's will pry off without much effort. Occasionally you may have to use a small steering wheel puller to get it off.
To install, do the reversal of the steps with the exception:
DO NOT TIGHTEN THE HARMONIC BALANCER WITH AN IMPACT.
You will need to torque it to 160 lbs. To do this it will be necessary to have somebody hold the flywheel end of the crankshaft with a large screwdriver.
A couple of other things to consider; while you have it off you may want to change the front main seal. It can be done this way, but you must use care if you plan on installing it with out removing the timing cover.
Also, dont forget to oil up the new harmonic balancer before installing it.
Alxe grease works good for this.
Finally recheck your engine timing once your done It is almost always off a little.
Hope this helps. I know after I changed mine, the wobble was gone, the engine idled smoother, and my timing was about 2 degrees off before.