Is the crankshaft out of the engine? If so, just bolt the flywheel on and stand the crank up under the spindle of a floor-mount drill press. A complete engine can be set up the same way if you support it properly. Drill a hole in the crank snout 1 1/4" deep with a 25/64" drill bit. Then clamp a 7/16-20 tap into the chuck and use a long bolt in the chuck key holes to turn the chuck. Back the tap up a little every 1/2 turn or so to break the chips off and avoid jamming the tap and breaking it off in the hole. Taps are HARD and a broken one can't be drilled out. Once the hole is drilled and tapped, rent a harmonic balancer installer from a FLAPS to push the balancer onto the crank snout without hammering. DO NOT USE THE CENTER BOLT TO TRY TO PULL THE BALANCER ON! You'll strip the thread you just worked so hard to create!
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!