Hi i'm from argentina, and i own a 1980 silverado. I'm really interested in changing the transmision, and turn it a 4wd. These are the pics.

 

Welcome to the Forum!

That is a nice looking truck! From the pictures, it looks really good for being over thirty years old!!

I cannot comment extensively on your 4WD project, but I can tell you that it will take quite a bit of modification. Of course, it will be much easier to do on an older truck then a newer one, especially with the lack of all the "fancy" sensors and computers found in cars today. That being said, if you have your heart set on it, I would go for it! Good Luck!!