There was a thread on here many months ago about overclocking the chipset... come to think of it, I think it came out of a thread I started about using a pin-compatible 68010 as a drop-in replacement on an A600.
If I remember correctly, overclocking the chipset did not work, and there were severe video problems. Theoretically, if you could get it perfectly doubled, you might have a default 31KHz video output. (?)
