Hi, i hope somebody can help me. Im replacing the head gaskets on a 2001 F150 SVT Lightning. I am having trouble undoing the lower super charger pulley in front on the crank pulley. I have removed the starter motor and locked the fly wheel, but i am unable to undo it. Can anyone help. Many thanks Peter

 

It's reverse thread so keep that in mind. And it's fairly tight on top of that