My non-original "63 Dart radiator is rotted and the Spectra CU527 22" (replacement for '69-74 Dart) copper/brass unit looks pretty good at around $175; the 225 /6 is hot-rodded a bit and could use some additional cooling capacity.

The support opening is 20", so I may need to trim the opening for best airflow, but I'm concerned that there won't be enough metal left to drill new mounting bolt holes for the CU527 radiator. No luck getting any of the suppliers to pull one out of the box to measure the mounting holes centerline-to-centerline dimension or the overall flange-to-flange width.

Any one out there with a 22' radiator equipped '69 to '74 Dart or Valiant with a
measuring tape to provide the dimensions?

Thanks in advance.,
Marc

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