Yes you can use the milled receiver stubs and grind them down(or mill) and convert them into trunnions. Install them in the stamped reciever, drill and rivet away.
As far as handgaurds go I don't know. Personally I would leave the hand gaurds because they add to the "effect"
You could use the milled front end and install another stamped rear trunnion. I have a romanian G with a hungarian side folder. As far as the barrels go they are luck of the draw. The yugos saw lots of use and their ammo was corrosive.
Let me know if you want to go down to apex. I might want to ride along.
