Radiator construction

It doesn't really matter for any of the projects I work on, either work just fine. Race cars usually get an aluminum radiator while street cars and resto mods get the factory style. I put a factory Cordoba radiator in my '72 Duster just because it looks original that way. I don't think I'll have any trouble keeping the big block cool with the factory radiator and it looks stock. A lot of aluminum radiators look like a Pep Boy mess under the hood. I prefer a cleaner look on my projects.
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I painted the top tank of my aluminum rad black for that reason, looks weird having a big shiny aluminum part in a not-so-clean-and-shiny engine bay lol. I also lightly sprayed the front of the core because I hate seeing anything behind the grille... too many resto jobs have body color and shiny metal parts behind the grille and it looks like crap, your eye is drawn to what's behind the grille instead of the grille itself.