Series II coupe will fit a series II sedan.
Tail lights are mainly refferred to as "kinked" and "non-kinked". series 1 is non kinked, all the rest are kinked.
they are all interchangeable but iirc theres a slight different between the 2 flat boot ones i couldn't get the bulb holders to line up it just needs a little bit of plastic to be cut out unless u get the looms as well.