There is such a thing as the “scrub line” , if I remember the term correctly. I don’t recall the pure definition, but basically it refers to the fact that vulnerable components need to be above structural elements of the truck , I. e. the frame, to prevent them from getting damaged or scrubbed off if the vehicle bottoms out. This particularly applies to front end components, the loss of which could be disastrous.
I don’t know if the scrub line standard applies to exhaust components, but it does sound as though you need to assess how exposed your exhaust system is to grounding damage.
