which shroud should I be looking for?

hey y'all. some time ago I started a thread on an 26" aluminum rad and 7 blade fan w. clutch (thanks ed72demon!) that I was putting in my 72 Duster. Made the cut to the core support for it to fit and now I need a shroud. I remember a post about watching out for the repops sagging into the fan blades. What part # should I be looking for.