Took a break from working on the cab and replaced the emergency brake cables, front and rear. Heard the Delco parts were better, I had some aftermarkets on the truck that just absolutely sucked.
Fitment of these emergency brake cables is not so great when adding to the aftermarket rear control arms (React Suspension arms, seem to be a universal problem for all tubular aftermarket arms though), so I had to grind open the mounting 'seat' for the retaining clip.
I was also advised to remove about 5-6 coils from the cable to make sure it doesn't bunch up in the drum and cause issues.