You didn't say what year truck so I'm assuming it is a 47 to 55. I have done 2 of these setups using the locker e brake cable Lokar EC-8004U U-Cut-to-Fit Rear Brake Cable Kit. But I use all the original setup. I just install the cables in my drum brakes. And cut them to fit the cross bar brackets. I leave everything else original You could use a cable going from your hand brake to the cross bar. But I would install a spring from the cross bar to the frame to help with releasing the cross bar after you unlock your e brake. I don't think there would be enough pressure with just using the cable springs at the drum to release the brake. Why didn't you just go with the original setup from the cab to the cross bar were the parts missing?
