Marcus,
Thanks for being the sound of reason and confirming. Apparently there is a dress up kit type cap out there listed that had the restoration guy questioning. I assumed brass also but I'm a rookie and needed experts to chime in.
For calls SA, gentleman in North Dakota named Tim is restoring two caps for me. He comes recommended. I'll post pics when I get them back.
Marcus, any expertise on gas tank protector boards? Dimensions, material, texture, color, any differences between car models or production plants etc...
Thanks Dan