its on the top cover well both are stop lever front of top lid and fast cold idel at rear in top lid so all easy to get to the big distributer head one i never did as wasnt leaking on mine and have been advised is a awkward job to do with pump on the car look at the gov mod guide shows you how to remove the top pump cover a very good guide i used it as refrence.
http://306oc.co.uk/forum/thread-79.html
http://306oc.co.uk/forum/thread-79.html