I don't see proof of Flozing. Painted, yes. But the bolts are not painted, the outlet is untouched, the rotors look unmolested...
I don't know. What I would do with it is take the nose drive off and spin the pulley. If there is absolutly no catching in rotation or play in the shaft, I'd be tempted to leave it as is. But replace the needle bearings in the case because you have no idea how long they've been there and put a new coupler in it. The Floz guy once told me he takes the rotor coating off all the units he worked on. While you've got it apart, clean a spot on the rotors with ...Bill, help me out here... something. If it'* grey, they should be alright (and possibly free of any flozing at all). If it'* bear aluminum under the carbon build up, I would do a full rebuild before I took it anywhere near my car, including a set of recoated or otherwise properly coated rotors.
I could look it over very well. Shipping here and back might be a little steep for weight alone, though. Your choice.