Diesel Engine to G460 300D

Hello all.
I tried to fit a turbo to my OM 617 engine.It makes 6-7 Psi at 3500rpm, but when
So the problem is the truck stills weak
Maybe the engine is too old so can not make the power.I looked for all the threat of ''engine swap'', so for now i understand that the OM 617 was not desigh for a turbo.
I think it's better  to buy a another diesel from sedan car to swap.
So my friends from all the wordl pls give a good answer :
1-Can i rebuilt the Om 617 with new pistons, bearings, valves,camshaft,chain...................and modify the exhaust manifold,get turbo, do somethings with the pump . And get about 130-150 HP?Will the engine last for 100.000 km ?if i go this way, the problem is no one in our country can rebuilt of modify the injection Pump.I need to buy the another pump, maybe from the Om 602 ,anyone knows that will the 602's pump fit to 617?

2-By the Musso engine Om 602 and swap . Will my 711.200 gearbox fit OM 602?This engine in good condition can be found in Vietnam.

3-By the Om 603 Turbo from W124 and the 5sp MT 717 gearbox from some W201 or W124.This things can buy from Cambodia.
Do i need to modify the Oil pan?HowMany troubles will be from this swaping?

4-Anyone been in the Malaysia Rainforest Challenger?
how do you think if i bring G-wagen to this challenge?Its the same with Ladoga but more mud,the malaysia car all use the mechanical winch and light weight cars.

Sorry that so many question!But i am newbie in Gwagen, but i love it so much.

Thanks a lot !
PS: If anybody from forum  go to Vietnam, send me a email