Here are some more pictures. The back end since the muffler is farther out then the body, I had to make the body lift up, slide back, then tilt. Had to put some more support in the back end, fiberglassed in some foam, and carbon fiber sticks, along with epoxing in some steel bar, very strong now. Needle bearing guide the sliding of the back end, clears the muffler and can tilt.
Put in a sound video, but I dont think it worked, when I tried it its black and no sound, must be doing something wrong.