$63 euro's for an EC, have you got money to burn??
You should have got a FULL MC68060RC50, with the Mask 1E41J.
These overclock to ANY speed you care to throw at them. They are totally cool at 50MHz.
With a heatsink and fan, they overclock to 90/100MHz in other systems which have SDRAM (wont overclock past 70/80MHz on a blizzard due to low speed DRAM).