Agree re-core is a good option with a high efficiency core if the tanks are OK... though if its the original '65 radiator, they may not be.

If going new a couple more options. Mancini sells top tank aluminum 2 cores with thick cores. I run a 26" version on a 496 with AC and cools great. It does need their custom shroud. A bit spendy.

Champion is another option if they make one to fit your car. Lower cost. You would probably want a 3 core. Cores are thinner vs the Mancini radiator. I run a Champion on a brand F PU and works well.

Either one, painted with radiator black paint, looks decent in the car IMO. Not stock but not too different.

With either suggest a shroud.