I put an OER radiator in my 1970 duster and so far it is working fine! my question is, where did you get the fan shroud from and will it work on my 1970 Duster?
Well, the shroud I am using came with my 65 'cuda ... Part of the heavy duty cooling package... Back then they were a Two Piece Metal Shroud... I was able to make different clamps to get it to fit my new OER Radiator!!! I don't think it would work on a 70 and up A body Radiator... as they changed where the inlet and outlet is and the size, from what mine is... Sorry, but happy the OER is working (cooling) fine for you !!! :)
Note: I was driving my 65 'cuda this past Saturday in 113° ~Heat~ and I'm happy to say all is fine with my OER aluminum Radiator as well !!! :)