Hi Salvy,
Sorry for late reply - i dont get online every day.
I actually have a 4JB1 turbo engine with manual 5speed transmission and transfer case at the moment.it has 218,000 miles on the clock [assuming it is the original engine].I drove the vehicle for 2000 miles before taking it off the road, and the engine seemed fine .I have examined the clutch and it has an almost new disc, with a slightly grooved pressure plate.The flywheel is very smooth. The gearbox and transfer case are in very good condition. If you are interested in this or any other 2.8 isuzu engines, you can drop me a line.They stopped selling them here in 1992, so every engine will have done over 150,000 miles, but I have yet to hear of a well - maintained engine that has worn out!