I am running a GM 10 bolt from a 1977 Trans Am and am trying to identify a means by which I can connect the rear drums to the original E-brake set up. Specifically I am wanting to connect the right and left side cables to the outside attachment points on the pivot bar. Has anyone done this on their truck? The original brake cable does not work as the drum end has a unique mounting flange feature not supported by the new backing plates.

The other option is to use an aftermarket cable system. Does anyone have a supplier they can point me towards for this option?