I won't comment on the Electric drive part, but the 7.3 Diesel can be made much more effcient. Most focus on making more power with those motors, but all those mods are doing is taking better control of the fueling, thus they also work to make better mpg...which is a little counter intuitive to the gasoline engine mindset. Anyhow: single shot injectors, better fuel delivery lines that are regulated, better HPOP and such will really help out. The ATX will be a problem, especially if they beat on it, it will slip. There are better ATX's but they get real expensive...MTX will be much better suited for what you are doing. Because these get such bad mpg to start with, just a small change will have a big effect in fuel cost.
Hope this helps...
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