A much simpler engine turning aid can be made by welding a big nut to a piece of 2" steel flat stock and drilling a couple of holes at the same spacing as the puller holes in the harmonic balancer. Bolt it on, and use a socket and a breaker bar, or a long-handled ratchet like the Snap-On 1/2" drive 14" long one I've been using for years.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!