i am towing a apx. 8,000 # 5th wheel, i put on an extra leaf spring and it tows good now but a little extra power going up hills would be nice
what would a chip do for me ie: gas mileage, power, etc.
right now if i keep it around 1800rpm on the freeway i can get 9 mpg
Be careful, you don't want a "chip", you want a tuner/programmer. I'd go with a diablo sport predator or superchips flashpaq, and I'd choose the superchips for towing. You do have to run 91 octane I think to use the tow tune, but it will give you more torque, probably about 15 lb ft(you can check their site). It will also help your transmission shift points, among many other things. For a few hundred bucks it's worth while. When not towing you can use a different tune and get better mpg and power too...