The guy I deal with is on vacation. Between him and myself we will not see each other until about August 8th. Now I do not mind helping you, but there were two Vickers pumps used in the 550's THE KITS ARE NOT THE SAME, understand. We probably converted 75% to the later wider kit. I need a measurment and all the numbers off the side of the pump or forget this. I am not going to try to find a kit that you can not use. I worked for a dealer for 16 years in the 60 &amp; 70's. I have had one or two so to say apart.