Things you need:
1260 ROM CHIP
1260 Voltage Converter
A good quality 68060 chip (MMU/FPU)
Extremely good soldering skills
You will need to do the following soldering:
Solder the volatge converter
De-solder the ROM chip
De-solder the 060 chip
Solder the new ROM chip
SOlder the new 060 chip
A guy on this forum sells the ROM and Volt converters.
060 chip = 50-60 GBP
ROM = 7 GBP?
Voltage = 8 GBP?