If you hammer the balancer on, first drive a wood wedge between the flywheel and the back of the bellhousing to keep the hammer blows off the main bearing thrust flange. Use a BFH and a big 3/4" drive socket to surround the hand crank lugs and an extension to keep from damaging the lugs. Drive the balancer on until it bottoms out on the timing gear.
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!