It all depends on the year, I believe. You are referring to the 3rd gen Camaro's, which are the ones that sported the 305, and it varies greatly from 1982 onward. In 1986, I think you had several options, including 2 carb models, and a TPI model. I am not certain what the HO would be, but the TPI made the most power. As for the exhaust, I think it is safe to assume that the exhaust has been changed at least once since 1986, and it is always possible that a smaller pipe was put on.
[This message has been edited by BreathWeapon (edited 11-19-2001).]