Ok so I'm trying to finish my motor by thursday and I cant get this ishhhhhh offf.

Im transferring my parts over to the new motor, I got the crankshaft pulley off, the water pump, and everything else but I cant seem to get this crankshaft sprocket off. There is no bolt holding it in, but it wont budge. Idk what to do about this and its holding me back!

Any help is repped until the mouse button breaks