The worth is in how much an individual values the bells and whistles of a newer truck over an older truck.
I chose to build a higher HP 7.3 for the uniqueness of it and forego the bells and whistles. Sometimes I question my decision. I'm just too deep into the 7.3 to quit now and break anywhere near even. I might choose to make a pure drag truck with the power plant, put stock parts back in the '03, to sell, and get a new truck to drive, getting well over 400rwhp on just tunes, to boot. That decision will be made after I see how the compounds perform. I'm really looking forward to the compounds, even with all the tuning difficulties that will come when I go to twin HPOP's (from BTS) and 400/400's ( for race/dyno days).