...New old stock 74' RSR front oil-cooler. Take a look.
Also, see photos of a 74' RSR oil-cooler on a 'side-by-side' comparison against the front oil-cooler used by a Porsche 908 https://pbase.com/slidevalve911rsr/911rsr_technical_behr_oilcooler_74rsr_vs_908 - Amazing to see the few differences between the two (core is exactly the same!).