Welcome back to the Gen 4 Family. I know this was a older post but just seeing it. I recently sold my 04 SSR and purchased my 97 Z28. previous owner took excellent care of it garaged and never driven in bad weather. only had 20,000 miles on her when I purchased her in 2017. Love the Gen 4, these babies look fast just sitting still. The previous owner did install on of the newer digital "Multi Function" sound systems BUT that wasn't for me. Purchased a New Monsoon OEM Radio with the original cassette and connection for the 12 disk that was still in the back. Wonderful sound. The seller is OEM-Radios INC. if anyone is looking for a OEM system for their Gen 4.
"Long may you run"