I just looked thru my parts sheet and AllDataPro.

the bars on 3 types of Gen 1 monteros "look" the same but have a different part number than the Gen 1 D50.

The differences in the montero sway bars are just diameters. With the right bushings it seems to me that any of them would work.

'83 D50 bushings MB109682
Monteros
'83-89 2.6 swb bar MB176435 21mm
bushings MB176442
'89-90 V6 swb bar MB176438 26mm
bushings MB573784
'89-91 V6 lwb bar MB573753 27mm
bushings MB573783

part numbers are cast into bushings. I don't trust alldatapro on part numbers.

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.