Installing Accurate dual exhaust on ‘67 Barracuda

I had some "issues" on my 70 dart, I swung the one mid pipe around, I had it on backwards even though it "looked right" looking at the old walker catalog. I think it ws the right side or passenger side, it was coming out "too long" I had to fight with it to get the muffler and tail pipe to go together. I dunno at some point I dropped the middle section from the head pipe to the muffler and flipped it around and it worked fine. I was on a creeper no lift so it was fun...:)