This crank cancer ******** is getting way out of hand, and becoming a common term for "I'm a retard and should not own tools". How in the **** are you going to cause "crank cancer" (ooooh I shudder just mentioning it!!) with a crowbar? Furthermore, why in the **** would you use a crowbar, when the proper tool can be had for less than ten bucks, or a free rental from Autozone??
cetroutt: If there's an Autozone near you, you can rent a puller for free. If there's a Harbor Freight store near you, you can buy one for less than ten bucks.
http://www.miracerros.com/mustang/pulley_stock_puller.jpg
This is the type you want, and how it's used, the exception being our pullies have two threaded holes as opposed to three.
To install, it will go on by hand for the first half inch or so, wiggle it while installing and you can get a little more on. Grab a length of 2x4 or other suitable soft wood scrap, and use that to tap it on enough so that you can get the bolt started, and use the bolt to pull it in the rest of the way.
Speaking of bolts, proper crank bolt spec is ******* dropping tight, plus a quarter turn.