Or possibly fit an overdrive transmission (if you don't already have one) That will drop your revs and improve your mileage. I'm shooting to only be turning 2k rpm at 75 mph.tjones85 said:i know its a little costly but if your geared low you could step up a notch or 2. my 85 runs 274 rears. i get 15 on the h-way with a built 318. well i did till the tranny took a dump. before i had the motor rebuilt i was getting around 18-20 on the h-way.
btw mines been lowered (2wd). its 28" at the fender lip on the front and 30" in the rear. nice rod rake.On the whole aero thing, yeah we are a brick, but some bricks are better than others. An extreme way to gain mileage would be to slam (lower) the truck all the way down so it looks like a trade show freak. This will cut way down on the air moving beneath the vehicle and lower the overall drag a bit.