Originally Posted by
rspears
Not to be critical, but looking at those first two pictures above, since you had to put the "dip" in the tail pipes for axle clearance why wouldn't you just go up and over and be done with it, never to worry with it again? Those low points are going to be the first place that rusts through since they will be the collection point for all of the condensation that forms on startup and it won't evaporate away until the whole system gets hot. A pair of mandrel "U's" and some transition bends would be all you need, your support points would all stay the same and you'd never worry about axle to pipe hits.
I recall that Ken Thurm used his frame rails for wiring, and maybe for fuel, too, but he had dedicated tubes welded in for everything along with some access port covers as I recall? Not sure which build it was on, but I remember him jumping some hoops to make it work safely. Sure looked clean on his, but it wasn't as easy as pulling stuff through the frame.
On the battery, do you really want to have to lay down on the ground to connect/disconnect or hook up cables if the need arises? I know it it were mine it would be parked in the mud, or over a puddle any time I needed to check anything. Just an idea....