Here's a 4-page letter regarding the exhaust systems on the Camaro & Chevelle...
https://www.yenko.net/attachments/116788-LETTER1.jpg
https://www.yenko.net/attachments/116789-LETTER2.jpg
https://www.yenko.net/attachments/116790-LETTER3.jpg
https://www.yenko.net/attachments/116791-LETTER4.jpg
Kinda looks like they're showing the mufflered exhaust with the right pipe welded but not the chambered?
I don't believe the tail pipe on either of our chambered cars was welded??