my contributions are all for a V6 SWB montero or raider...
the limited slip differential from a 1988 or 1989 Starion is a direct fit for the 1989 and 1990 SWB montero and raider front differential; if you're not seeking lockers, an LSD is a nice upgrade from the stock open differential.
the torsion bars from a 1992 LWB SR are the same length as the stock Tbars on the 1989 and 1990 SWB, but are stronger.
the gen 2 trailing arms are a direct fit for gen 1s with coils and are stronger (re-engineered to eliminate a weak spot).