This is just my opinion, no scientific data to back it up (other than real-world operating conditions)...
There is a big misconception that 3 or 4 core/row radiators offer superior cooling. That name of the game is surface area. In my cars I run a 2 row rad with 1.25" tubes. More fluid is exposed to more cooling surface area. All 3 of them run 170-200, depending on highway or in town driving. Also, my cars show 210-220 on the factory gauge at the straight up and down position. So, that would suggest that the factory thought those temps were okay.
For reference, the engines I'm talking about are a Mopar 360, a Pontiac 455, and a Ford high performance 302.
