Swapping to 11" drums, what e brake cable?

I would at least see if the ones you have will work. I swapped out a 7 1/4 rear to an 8 3/4 rear with the large brakes, in my Dart Sport, and the cables worked fine.

The ONE thing I had to do was loosen the adjustment in the cable under the car to get my brakes together because of the larger brakes.