Hello, I have a '93 softtail springer. I'm trying to get the crankcase out to remachine the stud bolt holes (ripped out). I haven't done this before, so, I'm trying to get the proper information; so' I don't destroy anything. I need to remove the clutch assembly (clutch, primary chain, compensating sprocket), and then the back primary cover. How do you keep the assembly from moving, and do you remove the bolts with an impact driver? Any sage advice will be appriciated.