Thank you very much. There aren't any preparations specific for this trip but i wanted to make a reliable touring vehicle for long hauls like Khunjerab and Cholistan so i installed a few simple mods...
Vehicle: Mitshubishi Pajero 1992
Engine: 4d56 TDi (2.5 TDi)
Suspension: Ironman 4x4 Suspension kit (4 Foam Cell Shocks + 2 Coil Springs + 2 Torsion Bars) (1.5" lift)
Tyres: Michelin LTX AT2 31x10.5R15
Gauges: EGT & Boost Gauge
Intercooler: Mishimoto FMIC
And many more bells and whistles....
But the most important factor is its maintenance throughout the year.