I'm aware using an impact isn't the ideal way to do things.. but don't have much to work with and was by myself.. I couldn't hold the pry bar and torque it at the same time without the motor wanting to tip over or the primary feeling like it's going to break..
I set the impact to 75lb and tightened it up.. Taking the the bolts back out hasn't ever been a problem for me, the impact knocks them right off.. You just to work with what you have.. Now I have to put the motor back in today, that will be the hard part