Radiator: Repair or replace?

[morcey2]

In the continuing saga of my "new" 1985 K10 pickup, the radiator in it started leaking last night on the drivers side of the core. It's a 2-core original equipment type copper radiator. I replaced it with the radiator out of my '84 and it's working much more gooder (technical term). This one is a 3-core, also OEM type, thus has a little more cooling capacity. After I got to work, I noticed 2 tiny pinhole leaks on the hot-side inlet. Everything else is dry and it seems to be holding some pressure, but not as much as I would have expected.

I just got back from O'Reilly and they have a Murray radiator that is supposed to be a replacement, but it is a single aluminum core with wider tubes, but still thinner overall than the original 2 core. It's $140 while repairing the existing leak looks to be about $70, but I have a few more places to call.

This has A/C, and though it doesn't work at the moment, I want to have it working by summer. So, should I have the existing radiator repaired or replace it with a new aluminum/plastic one? I didn't have any heat related issues on the '84 even in the hottest part of the summer, so I do trust that radiator to cool. I just don't know if it is getting ready to spring leaks in the core from corrosion/etc...

Thanks,
Matt