Vintage aftermarket a-body 340 tailpipes

What is the ID?
Tried to PM you but your inbox is full.
Where in Illinois are you located? If you purchase the tailpipes I would love to borrow them to reverse engineer them. I have access to cnc rotory draw tube benders and can make really nice mandrel bent tubes. I just need some known good fitting ones to model after. I would be willing to bend you a nice new set if we could work this out.