1967 440 Barracuda

I've seen larger radiators put in without changing the core support. While not ideal, the car did work and didn't overheat. I haven't decided which radiator that I'm going to run in mine, but I do have a '65 C-body 413 radiator that is practically a bolt-in (same width, but taller). I ran it in my old '67 Dart hardtop until the core sprang a leak. I may go aftermarket, but will likely use electric fans either way.

Both my Barracuda and my son's Dart have 440s with factory valve covers.