A 5th wheel hitch. That will be awesome. I think @TRAT did that to his. Let's see if he chimes in here.
NItro, seems you are going full tilt on the power train. I'd love to see that. Mine will be used mostly to pull my trailers around for pics and video so I am concentrating on the scale.
Sweet. Please show us the result. There is so much room in that body, you can do anything!
I am currently upgrading the bumpers, lights, body and undercarriage in mine.