ebr

Is this bolt forward or backwards threads

Embalmer

It is threaded normally, but you either need to engage the transmission or prevent the motor from moving somehow to break the bolt loose. I would suggest using an impact gun or a long breaker bar or else the motor will start to turn on you. When reinstalling it, be sure to use a little bit of silicone in the keyway.

ebr

forward or reverse threads

Embalmer

It is threaded normally - you have to turn it right to tighten it and left to loosen it.

howarmat

lefty loosy righty tighty

odiaz

An impact gun will defintely help. I would recoomend the 4" Craftsman stubby impact gun. I was able to remove my crank pulley in about 5 minutes without having to remove anything from the radiator.

here's a set of instructions with other tips I learned the hard way when I did mine.

http://www.cherod.com/mustang/HowTo/Pulleys.htm