Guys, I have a set of Hooker headers/#2451-3HKR that I originally bought for my 65 Chevelle. I recently got my 77 Camaro, and would like to use these if possible. They look EXACTLY the same as the headers I pulled off. My old instructions for these headers say they will fit a 70-81 Camaro, but the new downloadable instructions on Holley.com say they will only fit up to a 74. I called Holley and no one I get on the phone seems to know if they'll work for sure. My questions is: Has anyone else used this style, or do you know the difference between a 74 and 77 that would make them 'potentially" not fit or fit?