Mike ,
If you go to Pre '68 Dave's web site
Here :
http://1.bp.blogspot.com/-7vPj-S1b-vE/UsCMTz8FaJI/AAAAAAAADxU/Vvb7JoMEEqA/s1600/dist+005.JPGThe spacer/cushion is not shown .
I kinda think that cushion/spacer in your photo came from another similar application .
I can't find that part in any of the GM parts manuals .
It's not in any of my old chevy distributor's .
Mike , question.......does the plug you have appear to be made of one solid piece
of material ?
Could it be described as a solid piece of bakelite ?
or
Does it appear to be a piece of bakelite with a fibre backing meaning
two materials that are actually sandwiched together ?
George
'54 3600