Everything Steve said above about newer trucks, axle spline counts, shaft diameters, etc just re-affirms that the Bronco is a 1/4 ton rated vehicle and it shows. People ONLY think HP kills parts and they are SO FAR from the truth. It gets so tiresome replying to the same mindset. All of us responding to this post agree (I hope so by now).
Spring perches, shock mounts and you can literally slap/bolt a disc brake kit on and bolt it all up (minor things like ujoint straps/caps, etc) but it will be done once.
Caveat on my build. I am a nit-picker for doing things as cost concious and as strong as I can afford and need. My willingness to look at numbers, data, whether I need to make .250" spacer rings so I can use a hub not designed to fit on a 14 bolt axle but make it fit because it makes my WMS .500" narrower then I'll spend a week to do it. You don't have to. Get a C&C rear, swap the gears and carrier to your ratio and locker of choice, bolt on a disc brake kit and slide it under your Bronco. You WILL NEED to move the spring pads on whatever 9" axle you buy anyway because your engine/trans/t-case is a different length than stock and it's imperative that your pinion angle is correct.
SO comparing it to a 9" install you are essentially welding on shock mounts and a couple other little items. It really is that simple (unless I forgot something obvious)!
Like rocknhorse said, a 14 bolt is not overkill and minimal fab work.