A great wrench handle extender is the handle off your hydraulic jack if it fits over your wrench. I have never torqued them. Juts all my strenght with above handle on long breaker bar.
I torqued mine to 150 with torque wrench. Then, I used the bar tube from the hydralic jack, slipped it over my regular torque bar and tightened it about a half a turn. It is tight, but I think I can go even more. I am afraid of snapping or stripping. Then what??????
Some locktite on the threads & a good impact with at least 120psi feeding it. You can let it go and hammer for 30 seconds or so. The bolt is very stout and won't break, at least the 30+ I've done haven't broken.
The engine rotation is the same as turning the bolt to tighten it. On mine, I wipe a SMALL amount of never seize into the balancer to prevent rust, ensure that the balancer is seated, and then torque it down to spec. Heck, I've run 'em up with an impact before, and both ways I've never lost one. I have seen the elastomeric rubber go bad in them though. Invest in a new one. Your radiator and condenser may thank you later.