flywheel / stator nut problems

[caylib]

hi guys im from South Africa and im battling my ass off,i bought a firebolt and low and behold stator gone bad so tried to take it out but have a small prob... the ******* befor me welded a plate to drive sprocket side onto nut so, i grinded off gentley, but nbow nut is stuck is nut left or right thread? what can i do to remove i tried heat,impact wrench/tool,powerbar please any advice would be great. as you can see im really in the ****