Question

I was wondering fellas can you make a 2WD truck into 4WD.
Here in Australia I can get an ext cab silverado that 4WD but you cant seem to get the regular cab 4WD. You can get a regular cab truck just not the 4WD one. I want to make a regular cab truck into 4WD.
I know transfer case, tranny, etc can you put an open diff in the front?
Will it just bolt on?
Any info would help thanks

Nevermind figured it out myself....