Found manuals and a few bits and pieces but nothing I can use to compare parts.
Am in Korea and the army uses a truck VERY, VERY similar to a SJ413.
But these are 1980 - 2000 models and their called something that I can't pronounce or type here.
Looks the same, sounds the same (put, put, put)
I have the opportunity to take one for a thrash next weekend and while I've got it I plan to suss it out,
Haha, nothing like a weekend of having a go at throwing a grenade, and a few bottles of soju, (bottle of beer (rice wine) at 20%)
The best part is that Koreans just can't drive, heaps of parts around and no-one wants them, it's illegal to modify your car, if it's not factory it's illegal. Unless you happen to be driving an army issued vehicle

Might be a long shot but with the prices you pay in NZ for bits, it could add some late model bling to someones truck.