Does everything else still work (serial io, scsi, DSP, floppy, memory, video etc.)?
On 68040 machines, the highest speeds we can run with our kits are governed by conflicts with the serial subsystem (and the video on the AV machines). On the PowerMacs, other components on the motherboard govern the highest attainable speed. The faster oscillator we supply is just below these limiting speeds. We also provide a second, slower oscillator in case your machine has problems running at the higher speed. The Centris 610 uses the motherboard oscillator to drive its ethernet subsystem, so up-clocking a Centris 610 will disable the on-board ethernet on that machine.
