I have the TTI manifolds back 2.5 " exhaust , but with the H- pipe. Didn't offer X-pipe when I bought. If I remember right it is kind -of fishhook. TTI recommended a place called Hemispherical Productions for the rod. I think it cost about $30 , was new, and bolted right up. Mine is on a '74. I thinkk I got the wife of Hemi Prod. on the phone , nice lady. It took 3 weeks i think between shipping and waiting a week for him to make a few new ones.
I can crawl under the car in the next few days if you need to know specifically if it is the fishhook style.