Thanks for posting the ebay link Dave, I found the "H" type valve that fits my Holiday Rambler there. I ordered it and it comes with free shipping. I had cleaned up my old one and made it usable, but it still works extremely stiff. This will be a big help. I hope gman69 finds one to fit his although I didn't see one like his. I wonder how hard it would be to convert the manual slider for a vacuum operated one? I might look into that.
1984 Holiday Rambler Imperial