Convertible A-body (67-69 Dart) Rocker panel reinforcments

That is part of the vert that I haven't been into. I had assumed they all had the same inner rocker structure and the torque boxes just tied it to the subframes.
I have to metion this... I saw pics once of a rocker replacement on a p/u truck that went wrong. The rear end of the rocker was too high so the door hit it. No way to get the body lines right.
Good luck