Install an Underdrive Pulley - 94-98 V6 Mustang

Steps:
1. Loosen Bolts on Crank Pulley. Yeah, alot easier said than done.
Okay I first tried this without using air tools and I had trouble keeping the crank from moving. So I suggest leaving the belt on until you loosen the bolts on the crank pulley. The best way to do it without air tools is to have someone help you keep the belt from moving while you loosen the bolts on the crank pulley. There are 4 bolts that hold the crank pulley on and I suggest using WD40 to help loosen them up. Using an air impact wrench it is a tight squeeze but I was able to get bolts loose quickly and easily. Once the bolts are loose then continue to remove the belt and then the pulley.

2. Remove Old Belt.
This is pretty straight forward. I used the tensioner, grab the right socket and go counter-clockwise with it on the tensioner- this allows you to pull the belt right off.

3. Install New Crank Pulley.
Alright, put the new pulley on and make sure you get it straight. If you have a torque wrench, go ahead and torque the bolts up to 28 foot pounds.
If you are having trouble with the crank pulley moving, install the pulley and get the bolts tight as you can then install the belt and then finally go back and tighten up the bolts.

4. Install New Belt.
Do this just like you took off the old belt. Use the tensioner and go counter-clockwise and I had someone to help me put the belt on. Double check it and make sure it is all on straight just as it was. Start up the stang and inspect everything and then enjoy your extra 9HP!