I'd forget about it. First off, you'd need physically the extra set of 060 pins not present on the GVP board. There are such 68040 to 68060 socket designs out there, but it would be a $$$ way of finding out. Even then, there'd be problems with timing, glue logic etc. You'd probably be better off maybe trying to overclock the 040 to 40MHz by changing the crystal oscillator. Don't even know if that would work though.
