Yes yes yes ! This is the only way to get those temps to stay down. Especially on the rad. It'll cost a few $$.
Very good abjim. I figured we were just off on some of the detailed inputs.... your numbers were just coming in too close for you to be making any fundamental errors with the calculators. And the 68 cc number sounds like it is a good solid number to work with.
LOL. Interpretation included above.