go buy the Crank Tool. Snap Onsells them Cheap or I think Sears can order them. I used to have one. You ever notice the Hexagonal Shape of the ID of the pulley there is a Tool that Fits that with about a 24" bar that you hold it with and remove the bolt without spinning the engine. Constant Shock to the end of the crank can cause cracks.

eBay: NEW Honda & Acura Crankshaft Pulley Holder Tool 1990 - (item 160017348021 end time Aug-16-06 03:35:54 PDT)