1990 nissan terrano

Hi guys
Just got my first 4x4 dont know much about the scene but keen to get out there seems like a lot of fun.
I recently got offered a 1990 terrano 4 cylinder turbo deisel for free!
The auto box is nakerd tho.i found another one but its out of a 91 model does anyone know if this will fit my one?surely there cant be much difference