If attached to metal conduit, and you connect the box the proper way, you are fine. As for you stating that the conduit is bonded, clarify.
I thought that whether it was metal all the way from one panel to another, a ground clamp and ground conductor is required at each end... Being that I have that, I had assumed that the metal conduit from one ground clamp to the other was allowed as a ground conductor because the ground clamp provides better continuity than I'd ever get from EMT set screw connectors...I thought you used pvc.
You can not use the conduit as a ground unless you go from point a to point b with the rigid.
If you changed over to pvc along the way, you no longer have a conduit ground.