get a bit of heat on it there a bugger to get offbut try and try again if yu do strip threds use the old hammer ad zip tye trik u need engine out tho
right thred some zip tyes through the holes in the rotor and lift engine by them the put nut on end of crank and hit it with a rubber mallet or hammer keep doing it and it pops off
wind the puller up as tight as you can and then hit the nut with a hammer.. then wind.. it will come.. next time DONT do it so fucking tight with the impact wrench.. hand tight then a COUPLE hits wiht the impact wrench is more than enough
