I have a Huskey 500ft/lb impact and it has done the job many times. Just don't use an extension. The extension reduces the power. I also use a Moroso crank pulley wrench to hold the pulley from turning while you do it. The extension makes the difference but you will probably need to lower the engine a bit to get it in there without an extension. I just did my sisters timing belt and water pump on her 97' Accord EX and I could'nt get the bolt loose (never been off before) with the extension and as soon as I did it without the extension it got it no problem. You will need at least a 500ft/lb gun though. You can also use a chain wrench to hold the pulley but I highly reccomend the moroso wrench if you plan on owning your car a while. It fits the accords/civics/integra's that I know of.
