Your working on that 4 door V6?
Is the balancer you have that broke OEM or a Dorman/NAPA Chinese made?
I wonder(unles its Dorman) if you've got some crankbalance problems that made this failure.
I've used the starter to brake the bolt loose, too back when the torque spec was lower. Last week I welded up a wrench like they use on 90+ FMS. I'll be buying an OEM shortly and at $200 I don'twant to nick anything on it.

dave h.
'89 Raider V6 5spd;Aisin Hubs;; Gen2 LS: frt. brakes, rear coils;U.C.arms;R.trailing arms;idler arm; rear LSD axle w.disc brakes ;2 battery system for Dog's fan; relocated ECU; custom bumpers;J.Baker receiver;Conferr roofrack; t-bar crank.