I too have the ranco valve in my unit AND I need to bolt it together at eht top. My concern is getting a tight seal. I may spring for a new one if it give me any problems. I could always replace it with a valve under the hood (but that will look weird).

1960 GMC 305A V-6 Gallery Page
Remember, the government cannot give --anything to anyone --that they have not first taken away from someone else.
BUY AMERICAN http://www.stillmadeinusa.com/index.html