With an install tool and an old bolt, I gun it it until it just gets tight. Than with a new crank bolt and 1/2" drive torque wrench, torque it to spec. If you have any doubt, run a straight edge from the crank to some accessory pullies. I use the Blue Point lazer tool for alignment. Bought one from NAPA. Works great, but I'm sure O'Rielly's or NAPA will rent you one out.