Radiator question

what the GPM rate is .

Also keep this tucked away in the back. OldManMopar is the first guy I remember posted this, and I'm pretty sure this happened to me.

The original 2 core 273 rad out of my 67 was pronounced "very clean and OK" by a rad man and "should" cool a 360 just fine. It did not.

As a low buck guy I ended up trying a SLANT newer model 2 core I had from a junker and cured the problem

WHY?

Possibly, according to the "OldMan" is that thermal cycling, etc, causes the fins to eventually crack loose from the tubes, meaning you can flow all the water you want-------it might not actually radiate heat.