Let me share some tips on doing this job, since I just did one last week. You'll need a AC clutch puller to get the clutch off. If you don't want to buy one, autozone has one in their loan a tool program that works just fine. You will need a seal kit, which will come with three big o-rings and four small o-rings. The three large o-rings are for the body of the compressor, the four small ones go to the manifold. The shaft seal is a tricky one. I ordered two different kits and they were both wrong. You can just take your shaft seal out and replace the o-rings with any R134a safe o-ring and not buy a shaft seal kit. Here's what your shaft seal kit should look like:
This is what you get if you buy one:
The shaft seal housing is too short. You can just pop the black part off and replace the o-ring inside. If you buy the shaft seal kit (like I did), you can take the o-ring out of the new housing and put it into yours. The other piece is right. But you can see the green o-rings in the second pic, so you can just replace those and not buy the kit. If you have any other questions just let me know!