Fuel Injection Pump. If you have aircon, this will be awkward to photograph, as it is under it .... Another "difference" with the EDC ones is the EGR, which is a pure vacuum device, unlike the rest, which were vacuum and electrical
... Plus of course the wire to the now infamous #4 injector! .... and the CPS, and ....
My first D1 auto, which I really regret selling, was registered 8th Feb 1995 ( and is still around too
), and was EDC but did not have cruise control
... IME EDC was introduced in "fits and starts", and there doesn't seem to be a definitive date
.... it is either EDC or it isn't