Charging problems 67 Barracuda

Below we have yet two more variations. On the left is a round back which I have never seen. This has a version of the "hack" isolated brush, except it is commercially done. This might be an aftermarket casting, I don't know. Again, this one has a grounded brush installed, and the empty hole is for an isolated brush.

On the right is the later model isolated unit. These have two isolated brushes, and are a better design. you can also use these by grounding either brush, and connecting the remaining to the VR