Hey David! The first thing you're going to need is a couple of brake flanges like item # 4-35 to welded to your axle. This is where the brakes attach to and they have to be installed by a professional welder. The item # 4-35 is for 2-3/8" round trailer axles so you'll need to take a measurement to see how thick your axle is because this one might not work for you.
You're also going to need to replace your hubs. In order to find the correct ones you'll have to pull one of the hubs currently... view full answer...