4.7 differential for 2010 NC


I tarmac rally a 2010 Mark 3 (NC) MX5. It is a 2.0 litre with 5 speed gearbox. It has the 4.1 LSD as standard. I am keen to change the diff to 4.7 with LSD. I am having real difficulty in getting accurate information as to whether this is possible. Can anybody help?