I havent given this much thought, does DVLA need to know about a transmission conversion?
According to this page, it seems not, no mention of transmission on the list,
https://www.gov.uk/change-vehicle-de...need-to-update
But according to this page it is listed and uses up 2 points, but this is for new registrations only isnt it?
https://www.gov.uk/vehicle-registrat...tered-vehicles