I have a Auto Zone 3 core cost $146. Fit pretty good but needed to tweak the mount brackets. Keeps my mostly stock car cool, I did not know at the time the 3 row was not stock. That radiator is probably as good as any 3 row copper brass you can get, A 4 row would probably require an electric fan and removal of the factory shroud.
Anything better get a good aluminum radiator, not cheap but they can work real good.
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Frank W
90 5.0 LX coupe Daily driver. Silencer removed, K&N filter. Flexalite fan, 3 core radiator. FMS flywheel and Clutch, FMS blue wires Energy Suspension end links
88 Notch 2.3L 5 speed Parts/beater car
My two Notchbacks
74 Chevy Laguna Type S-3 305 Finally fixed getting a 454 to put in garage
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