As I said, mine was on my old '70 B body. I sold it to some stupid kid in the early '80's. Gauwd do I wish I'd kept that car. As I said, I put the factory RR/ Superbee/ GTX big factory mufflers on it.
Difficult to describe without pics, and WOULD I like to find the guy who bent them, probbly dead by now.
The tailpipes came out of the mufflers, immediately had a gently almost 90 out, then straight back maybe a foot in length under the rockers, then out at about 45 with big "baloney sliced" ends right in front of the outer edge of the tire. Marvelous sound.