It is best to post your questions in the forum that pertains best to your question. You are more likely to actually get an answer. What year Chevelle do you have? I have two..a 64 hardtop and a 65 sedan.
My 72 is a hard top also. It is a SS clone with a big block 396. There are some things I want to do to it to get it looking better. One thing is that it had side pipes on it when I bought it. I'm in the process of putting Flowmasters on it this weekend. I'd attach a picture but I haven't figured out how to do that yet.