Go over to the aerodynamics section and look up aerohead, he is one of the best and has modded pickups and other large vehicles. Big Dave has a F series Powerstroke that you can use as a guide.
If you want to do the ultimate mpg swap though, going diesel might be it. Put a 6.9 IDI, a 5 speed OD and 3.08 gears and you'll have a 25 - 30 mpg truck in that light chassis. And that is with an all stock engine.
Something to think about.
__________________
Volvo WIA42 VED-12 / 335 hp / 1300 ft/lbs / 9 mpg
Big n' Boxy, Never met a Hill it Didn't Like
|