How is the fuel tank in an fj55 supposed to be mounted, to the body or two the frame? How thick are straps, if any, and what grade hardware was used as stock? Only asking because I have an aftermarket tank which I noticed is in place my sandwiching between straps on the frame and a piece of wood against the body. So technically, it is mounted to the body and the frame. Not a good thing, so I'm planning on making this a little bit safer and more secure.