Worthy upgrade over an existing aluminum radiator?

This is a shot in the dark as I'm not sure Cold Case posts here anymore, but figured I'd ask anyway.

My '68 has an Afco aluminum crossflow radiator in it already, the core is ~18x22" with 2 rows of 1" tubes. It also has a mechanical fan with clutch, but no shroud since it is a universal radiator and not meant for the C-bodies so the original shroud doesn't fit.

It runs cool at freeway speeds at all ambient temperatures, it maintains 180*F as long as the car is moving. At idle in heavy...

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Author: Blusmbl