Look for an option code tag on the firewall just above the motor. If it has G80 listed on it, it shipped with the LSD. From what I've seen, pretty much only the turbo Imps got the LSD, and 84 was pre-turbo. Still possible though as it was an option. It will have 3.90 gears in it, making it great as a freeway blaster. Oh yeah, get the 5 Spd out of it too if its there.
The motor mount bolt holes are the same on the block, but you'll need the actual mounts from a LUV to swap it in. The frame side is completely different. It might help to use the oil pan from a LUV too, but other than that everything should bolt up. If you want to swap in FI, getting the whole car would be a big help. Fuel pump, wiring harness, computer, and a lot of etc would be needed.
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95 Isuzu Trooper Daily Driver
86 Isuzu Trooper reliable backup
77 LUV 2wd stock beltway blaster (resting)
79 4x4 LUV project: 2.6L, 5spd, 31s (eventually)
MEPR: Man, my 4x4 makes all other LUVs look good
