here's some old Gen 1 part numbers from my dinosour #s on paper...

2.6
standard duty
MB176526
"""""525

H.D,
MB176524
"""""523

3.0 ( doesn't specify LWB or SWB)

MB109664 Right
"""""663 left

my FSM shows same length but different diameters for 89 SWB 2.6 and 3.0. #.0 has smaller diameter. The splined ends are the same size.

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.