There is also a good tutorial in the DIY section here:
http://986forum.com/forums/diy-project-guides/23057-underdrive-pulley-install-guide.html
I used the RSS pulley, I got it from someone on here that never installed it, but I probably would have gone with it anyway because of the counterholding tool and the holes in the pulley for holding it.
For cutting the boss (which was the hardest part, but for you it will be much easier with the engine out) I taped all around it with blue painter's tape, especially covering the crank pulley area, to keep any shavings out.
The RSS doesn't come with a new crank bolt, so I bought a new one and a new washer. If I had to do it again I would just get the bolt; the washer was very expensive.
I could feel a small difference and I haven't had any trouble with AC or the battery charging.
Steve
Threaded Mode
