[MrBruce]

I just did my 31 Pickup and used Bob Bidonde's diagram and it had three brass slip rings in it and I put three new ones back in and used cork gaskets, works great and no leaks.
There is also a new brass float made and sold by Reeniee Kotas, San Diego which is really neat and will last a life time. They aren't very expensive. I think if you do a search it will come up under Reeniee's name.