This will be on my list as well, but please explain what an underdrive pulley is and how that will help.
Thanks.

 

this is a good investment to me because it gets better mileage when u drive ur truck normally 99% of the time and better performance when u play with it the other 1% of the time sounds like a win win for me

 

an underdrive pulley is the pulley that spins with the engine, and turns your belts in order to power the accessories such as ac or an alternator. If you put a smaller pulley in then the accessories do not spin as fast, so its not as hard on your engine, but it also means that your accessories will not be as effective.

 

Thanks for the explanation redbud

 

so dimmer headlights, quieter radio, ac not as cold, and harder to turn the steering wheel, but hey, you gain 5 horsepower...maybe

 

I had installed one on my 98 Ford(which I totalled) and the performance of the accessories did not suffer. No dim headlights or harder steering. Now that may not be the case with this truck. I will update after I install the thing and drive it a while. I really do not expect problems.