I am ready to install my oil pump after removing the pan and looking for a rear main leak.  Fortunately, the seal is not leaking so I am not going to fix something that is not broken.  When the engine was assembled about 45 years ago, there was a washer at both ends of the rubber bushing that seals the oil pick up tube to the oil pump.  When I removed the tube from the oil pump, the rubber bushing was hard and it has what appeared to be a steel washer at either end of the rubber bushing.  The replacement one is only rubber.   The illustrations do not show the washers but the old one appears to have fitted to the inside of the bushing at either end.  Perhaps the Ford part number B4A 6698-A came with them as an assembly so they did not show the metal ends for this approximately 1/2" long rubber compression seal.  

There is a washer, part number B4A 6626-B that was on the inside of the pan between the flange of the tube and the opening for the tube.  The one that was there was a fiber washer.  Others have said that it should be copper.  Is the material of the washer important?  Also is is a good idea to put another washer on the outside of the tube between the pan and the nut that holds the outlet tube to the pan?

I am hoping to seal as many leaks as possible.  Thanks!!