When I went to install new TTIs on my car last winter they hit the steering linkage and driver's side torsion bar badly. After getting the engine sitting in there correctly according to TTI instructions, shimming motor mounts, egging out holes to push engine back 1/4", the headers fit great and required no dents.
So my point is just because someone had issues with TTI fitment does not mean it is the header. Chrylser was very sloppy with the k-frames and a lot of times the engines don't sit in there correctly causing the headers to hit.
