I assume its disc as it has the bracket for a caliper, never seen the difference as a lot of this is new to me. Also not quite sure what the snapped thread/nut is(the rusty one) not got that far into it yet.
Put a picture up of the caliper mount, it look's like the original lugs have broken off and a PSN bracket has been fitted?
Should have the hub shortly if all goes well, been trying to get a rear wheel and silent block mount made up(or a cheapish frame) for a few weeks now with no luck
Buy the silent block rubber bush+spacer tube, get some steel tube the same diameter as the silent bush/same width, cut tube and weld on two m8 nuts either side of the cut, use m6 nut'bolt to pinch tight on the silent bush. Using some 25mmx50mmx300mm ish long steel box section weld it to the steel tube along with a m8 steel tube for the stand bolt. Get an engine bolt through the scissor joint/silent block then offer it up to the frame, put main frame bolt through scissor joint/frame and see where it touches the main frame. You may need to cut and put a bend (downwards) in the box section then weld it to underside of the frame.
Understand it ain't too hard just the welding I'm new to welding and don't want to put my trust into the welds holding up