has anyone ran a 2.7 pully on his truck and what do i need to run one??

 

why would you?

 

I wouldn't recommend it. As blownchevy said, why would you? I am currently running a 2.75 and it's tooooo small. I'm going back with a 3.0 with some dyno time and I am hoping to get more power out of the truck. I'm having detonation problems right now (bad) and if I pull more timing I wont have ****. Smaller pulleys only help to a certain point, smaller is not always better. Don't go smaller than a 3.0. With tuning you will make more power with timing than boost.