Woohhh!!
Took a little bit of "searching here --

I developed a roll of Ansco "Plenachrome" - found in an antique shop ... in Rodinal 1:25 for 7 minutes @ 20 degrees C... the result of a clip test.

Check out my post - and the others on this page:

Go to the top of this page and enter [ search ].
From there, enter [ Plenachrome ] and [ search for terms or use query as entered ]. Enter [ display results as topics ]. You should arrive at "B&W: Film, Paper, and Chemistry.
Then select [ Your thoughts on antique film development ].

*Should get you there. Note the comments on benzotriazole.