How about make them move, fight, grab scrap, basically like a Mutie, but just make them an up-gunned and tougher model? Like S/T 5 , A3, W3, +2 Sv ?
And then they could carry T/L Mutie gunz or invent a couple new types. And add a few Chariot only pieces of wargear (bladed axles, etc.) for...