With Bendix style drum brakes with good cylinders and shoes your truck should stop adequately under general circumstances.
If you are hauling heavy loads or running high speeds or your driving includes lots of quick stops with little cooling time between, you might want disk brakes.
Most disk brake vehichles have a power booster. This is because disk brakes do not help you apply the brakes the same way Bendix drum brakes do.
If you stay drum you probably won't benefit from power brakes. Go disk and you are more likely to want them.
Evaluate your drums and lines before you commmit either way.
My own truck now has 5-lug hubs all the way around, with disks on the front, and a dual master but no power booster.
It stops fine but I can tell it does not have the power brakes of my other vehicles. It feels uncomfortable when pulling a trailer because of the pressure I have to apply to stop it. Someday I'll probably upgrade to power, but most likely that will be after I install a V-8 and automatic too.
