The only thing I can think of (and when I was thinking about this I came up with this...) is what if one fuel pump dies... then you are left with a truck running on one bank... I would run them in series?
You might want to do a little research on the parts of the frame where they recommend to drill. Take a look at any of the airbag installation kits or even a GN hitch like the B&W.Had to drill the frame, it wasn't that tough though, just need a good bit.