No Amigo had an Automatic transmission and transfer case.

And, since the tranny and x-fer case is integrated (back of one is the front of the other) you can't swap transfer cases.

So...as Sean said, those gears will not fit directly. There are some difference between the two kinds of cases (fixed vs. slip yokes). It can be made to work rather easily and the fixed yoke set up is prefered if you are going to modify your rig. You will need have a driveline made up to fit when you are done, but it is a much better setup than the slip yoke if you are lifted.

If you ever think you are going to a one-piece driveline, (in your case, yours is one-piece, but we are talking one with the slip in the middle, not on the transfer case yoke) the best time to change out the back cover of your transfer case is now, if you are going to do Tera gears. As, if you go with a set of gears for a slip yoke case, you can't just swap over a fixed yoke cover in the future and use the gears.

Michael

PS: If it were me, I would go ahead and make the conversion. It is easy and not that expensive if you shop around for a case. I went the other route and did some fancy work to get a fixed yoke in slip yoke case.