Probably,
The rear LSD will fit but I am not sure whether it fits a 4 cyl or V6 Raider/Monty. The 83-84 Starion LSD fits the 4 cyl diff and the 87-88 fits the V6 diff. All fit the smaller 4 cyl axle splines. If it is the larger LSD like the 87, you may need to change front diffs.
Bob Shaw


87 Raizer, 4.3V6, Mod TH700R4,231CHD, detroit rear and LSD front, bouncy seats, 2" lift and 32x15 BFG MT tires.