Edited: 10/15/2007 9:15:54 PM by iLLblazer
Use Buna-N rubber. You can get gasket sheet and rings from
www.mcmaster.com.
On the 97 ranger in my profile I cut a 1/2" aluminum ring with tapped holes. The ring is welded to the cell. The pump sits on the ring with the gasket in between, and another 1/8 thick ring clamps it all together.
If you need rings cut let me know.