Pedal travel is pretty long as is, I usually have very smooth throttle control (I can keep it within .5psi of where I want it). I just have a hell of a lot of low end, an open diff, tires at 38psi (factory recommended is 27, which makes the sidewalls look flat), etc. If anything would help it would be a stiffer spring under the pedal but my foot already gets worn out on long interstate trips. If getting cams killed torque under 1600rpm though I would probably appreciate it though.

I've heard that the more throttle you use with the (reasonably) lower RPMs the better your gas mileage gets because throttling losses are reduced. Keeping it under 2500rpm I've always managed to get 26mpg (which is better than factory highway) in the city. Lean burn would be the IDEAL way to improve gas mileage since I could open the throttle way more on the same amount of fuel. That plus a fuel cut switch for coasting would rule.