vibration damper install

Been a long time since i have done an engine tear down.
What is the best way to install the vibration damper?

I remember using an install tool years ago but i do not know where to rent or buy it. What size is the hole in crank to attach the tool? this way ill know what to get unless they have a universal one?? does a 1969 273 engine even have this threaded hole?

does any one have a better idea? also whats the best way to stop the crank from spinning the heads are off.

thanks