i want to take the 3" pulley off my vortech sc and put on my 2.75" but i wanted to know if the bolt on the sc is right hand threads or left. i tried to loosen the bolt with a wrench while the sc was still in the car and no matter what way i turned it, i just turned the whole motor. so before i destroy something, can some one please tell em which direction do i turn it to loosen the bolt