Cab beat me to it...In Colorado air you are going to need to make some adjustments to get the torque back. For a knowledgeable local help for parts or tuning, talk to Scott McBroom at US Performance. He has a shop in Loveland off of 1st street and Railroad I think (its been a bout 5 years since I was there, so I could be wrong on the address). He helped me out a TON with a small block back in 2001, great guy.