I agree. I've used this method (or wedging a screwdriver in the ring gear of a 4spd). If worse comes to worse....the hillbilly way is to use a good impact gun, but your torque will be who knows what.
Yep, blip, blip with the impact. It's a big bolt with fine threads that screws in what, almost an inch? It will take a lot of torque. And I use a balancer installer tool and not the bolt.I'm one that uses an impact but will also use a dab of red Loc-tite. Been doing it like that for a lot of years with no problems. Most decent guns will do 150 easily enough but most of the big blocks are around 135 ft lbs but a few different engines take 200.....inch lbs.
I have several of these tools from you....I highly recommend them...They are high quality and do the job...I make a bunch of different tools to help with that task. http://arengineering.com/home-page/tools/