OME would work great on yours. Good quality. Look for a thread on Gen 2 to Gen1 compatability ,,,or gen 2 rear locker installed into gen 1. Maybe someone will jump on here and give you the link.

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.