A simple piece of threaded rod screwed into the crank snout would have pulled that balancer right on. Oh well, at least it was amusing to watch.
I want to hide and watch while you try that on a stovebolt six, or a Chevy V8 made before about 1965. I'll be the one that's amused while you search in vain for a threaded hole that's not there. Hammering was the factory-recommended way to install a balancer on those engines.
I've made a fair amount of pocket change renting or selling a drill and tap guide setup for threading the older crankshafts to forum members here.
Jerry