AOA bro
you have two options.
1- If you want to use 660cc turbo ecu (your original)...you need to modify your 1100cc engine distributer....disassemble 1100cc distributer .... retain its housing and replace its magnet coil with 660cc distributer (three wire) and its ready to be used with 660cc ecu ...
2- if you want to use 1100cc ecu , then you need to modify wiring of your vehicle little bit by some expert electrician experienced on mini wiring diagram...in this case you can use 1100 ecu and and distributer in original condition.
Note: Never forget to use 1100cc or 660cc non turbo map sensor with both these conditions
i hope it will resolve your problem