I wish this post would have started 2 months ago!
Bugman I never knew that piece existed! I paid my buddies who own a garage to do my water pump (leaking at weep hole) a couple of months ago because I was busy at work and tried of working on the truck all weekend. When I did the 203 T stat a few years ago I replaced the housing due to corrosion ( replaced with probably Dorman). I had no problems after I did it, but after the new water pump it leaked like crazy. When I took it back in we all scratched our heads and just went ahead and replaced the housing. It does not leak now but I am willing to bet the old one just got tweaked and that kit would have solved the leak.