dont know much but im pretty sure they're full float. if you got one for free ill take it haha. as for the 3rd, im not sure if its 8" or what. i know a kid who's keeping his rig building a secret right now, but he apparently is using a dually toy rear axle. haven't heard much about it and theyre hard to find.
I remember reading that the spindles from a SA toyota front axle will bolt right up so you can use the hubs, locking hubs or drive slugs and rotors. The only problem is that you will need custom length rear axles though. I can't remember where I was reading that. Probably Pirate 4x4
