wow – Thanks Frank and Garry !!

Edit:

Looking at the parts diagrams of the 1957-RD and the 1958-RD
they both take the same 0302528 Retaining Ring.

I just went out into the bright Florida Sunshine where I could see clearly
with my old eyes and – Low and Behold !! there is a slight raised ridge
on one side of the ring and a flat surface on the other side.
I have handled this ring a hundred times and never noticed there
could be a "front and back" side !!!!! Thank You !! for the clarification

THIS is why Friends should not let Friends – WORK ON MOTORS !!

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