Plus, the Coldfire is NOT fully compatible with 68060 or any processor before.
My best bet is another type of CPU (PPC G4/G5, x86, you name it), emulating one of those "old" 68k (020? 030?), but at 100x or even 1000x the original speed. With a table of instructions for emulate. The only drawback in this type of design is getting the code of old CPU. Motorola/Freescale won't give it away for nothing, so: :horse: