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Back in the 1960s I ran my now-restored '36 Chevy pickup for about 50,000 trouble free miles as a daily driver "Rat Rod". It had a small block Chevy engine and the stock '36 radiator was completely adequate to cool it under any and all conditions.
On my present street rod, a '32 Ford roadster I just added a fan shroud. Looking on hot rod web sites I saw a suggestion to use a cookie sheet for a fan shroud. I found one the exact size of the radiator core, 16" x 22", on ebay and for total cost of $14 it was delivered to my front door UPS.
Street rod building is all about creativity and that idea of using a cookie sheet for a fan shroud really worked out. It looks as good and fits as well as one from Summit Racing or Speedway Motors costing 10 times as much. In fact I couldn't have bought a sheet of aluminum to make it for that price.
On a restored vehicle a cookie sheet or fabricated shroud could be painted flat black and look right at home. In fact, I may put one on my restored '36 Chevy pickup even though it runs cool just for the "cool" factor. My wife's original, unrestored '60 Mercedes 190SL overheats in gridlock traffic and it will definitely be getting a cookie sheet.