Crank pulley ??'s

I'm trying to get my crank pulley off so I can get my vortech pulley on, but its like its stuck or something. It's been a while since I've done my underdrives, but you don't have to remove the center large bolt in the middle of the crank pulley to get it off do you? I thought it was just the 4 bolts surrounding it. If you don't, any tips on getting the pulley off, I"ve tried using a rubber mallet and just pound on it for a while, but still won't budge.

Thanks,

Thanks I just got it off.