[Zoomad75]

No problem Kieth. Here to help. Tradeoffs are everywhere when you start tinkering. Your setup is pretty conservitive. The tires (around 31" tall) and the 3.08 axle should put your cruise RPM at 65 right at 2100 rpm, which is pretty low, but right in line with what the newer stuff runs at with steeper gears and od trannys. A 700R4 would drop that Rpm by a few hundred at the same speed, but the cost to retrofit the 700 would be a little high considering you would have to change the t/case too. Again, the gain in mileage won't pay for the swap for a really long time..

The lift actually hurts the economy in the long run as it exposes more of the chassis to the airflow, which causes drag. More drag means you have to use more energy to overcome it. Again, its a trade off, you want to be able to run off road time to time so you sacrifce a little. Is the lift causing a huge loss in MPG? Probably not, but if it costs a 1/2 mpg and you are only getting 8 at the most now, but that's 6%. It adds up.

You really can't change the trucks Areodyamics (besides lowering which doesn't sound like an option). So you have to maximize what you got. Tune that engine up to run as effeciantly as possible. Add a high flow exhaust (with or without headers). Keep the tires inflated up to spec. Watch your driving habits. Holeshot starts are fun, but every time those secondaries open up, the toilet flushes more fuel.