I forgot one helpful hint. To keep from straining my wrist while turning the ratchet and trying to hold up the ratchet and socket combination with my fingertips I made a 10 inch length of stainless steel wire with eyelets on each end. I put one eyelet in between the socket and the ratchet head and protruded the other end up through the view port of the oil pressure switch this allowed me to not only hold up the socket against its weight but also to help place the socket on the switch initially. Another point the finer the ratchet the better because you don't have much swing in there. The job in total was about 35min.
Dave
