There are several conversion kits available online that you can use to convert this and more than enough articles on how to do it. It's fairly easy to do. I will give you a few links and let you go from there.
http://www.elitefitness.com/members/...onversion.html
http://www.angelfire.com/droid/kitsn.../HomePage.html
http://www.bodybuilding.com/fun/catfinaplix.htm
http://www.flterfactory.com/