Hi guys, thanks for the option, i start to have a picture about what i can do....but still need your help to take a decision, to built a custum is not a bad idea, thanks 79coyotefrg, you gave me aother important informations, but do you know if someone tried this before.....i mean....i will be the first to do this "experiment"? I tell you frankly,i cannot risk to start the work and than find that something wrong or dont fit. 
i'm not in italy, here in sudan is not easy to find parts,even if i agree with you that i can find here toyota one ton.....here all the car are toyota, and if i'm right, i have understood what is the one ton...i will take a picture of it...
As i wrote before....i need a shop list, can you help me? i will finish the work here in three....maybe four months, i had to start to find the parts and wathever i need now....i cannot wait...........
really i think that i will able to modify the car, but i had to think also about the load:
250 liters of diesel------------->200kg
200 liters of water------------->200kg
front bullbar with winch--------------->100kg
rear bar with winch--------------------->100kg
Spare tires---------------------------------->50kg
Food------------------------------------------>50kg
Accessories---------------------------------->99,9 kg
one pair of clean underware----------->0,1kg
TOTAL---------->800kg
I FORGOT MYSELF!!!!!!------------------>90kg
NEW TOTAL-------->890kg 
PLEASE HELP, I NEED DETAILS HOW TO BUILT IT !!!!!!! 
Andrea"klunk" 
When you put it that way, you should be fine, the weight is spread over a large area. I carry 5 people with luggae and a big subwoofer in my 4runner and it;s just fine (prob about 1300 pounds, and 4runners are heavier than pickups).
With the 3vze it's alittle underpowered but it handles the weight just fine.
How much weight are you putting in the bed?
