Datsun KPL720 Engine L18-444197W

Hi ... I need some help.... I´m from Argentina, and I need the workshop manual ( say this ?? really is the manual that use the mechanic man )
For a Datsun Truck year 1981 model KPLY720TBCY 4WD whit engine 1.8c (L18-444197W), i need the manual for engine and the rest of mechanic parts ( transmision, bodywork, chassis, etc.etc. )
Please if some one may help me I will be .. very very grateful, becose i have my truck right now stoped fixing some things, and becose this i need this manual.

Thank´s for your time and so sorry for my english ...
please respond at [email protected] i dont enter continuously here.