Best way is with a rattle gun. To get the pulley bolt loose you can simply fit a breaker bar and socket on and turn the engine in the DOR till the bar is up against the sub-frame and hit the key but to tighten you will have to remove the starter and hold something against the flywheel ring gear teeth. Best buy a cordless rattle gun if you don't already have one. Don't get too concerned about tightening torque just do it up mighty tight.