1) Since I am too lazy to google FVD, a Link would be helpful
2) Brake disks use PADS.. Brake drums use Shoes
3) You don't mention
why you want S brakes on the rear. The fronts do about 80% of your stopping. Are you tracking/racing the car? Just want the "looks" of an S?
4) I would imagine that yes, shims and other methods to get the spacing correct would be required to get the rotor/calipers to line up correctly.