AFAIK 68060 is the odd one where a 72MHz CPU takes a 36MHz XTAL.
68040 (I assume the one in V10 is MC68040RC25 or similar), in this case takes a 25MHz XTAL and will run at 25MHz.

The reason I gave V11 a 2* overclock is because of the so called superscalar(similar to Pentium) that is unemulated.