It is all coming back to me... slowly.
That wilwood link either did not play nice with my mobile or just didn't like me. I got your basic Wilwood product search page.
I have the red valve for rear drums you mentioned. I have the Wilwood combination distribution block and Proportioning valve. You lost me at stock metering valve retained.
Where does that typically reside? Mine was a manual drum/drum car and is a '68 if that makes a difference.
I thought way back months ago when I had noticed our similar parts (albeit mine for "Someday" reside in boxes yet) I could have sworn you had a brass colored aftermarket metering valve... or at least I remember looking one up in Speedway. Maybe I did not see it on Norwood?.. or maybe after 40 I just make $hit up to confuse myself and share it with others.
