I put the TTI's on my 69 Dart with a 340 and had some minor clearance issues, so I made some 3/8 or 1/4 spacers (cant remember right off) to raise the motor up a little and that worked fine. You cant see them so it looks stock. Also I was told by a TTI rep. that not all stock K-frames are welded exactly the same so there might be some minor issues there also. Good luck!!