I have converted 20 MGB's to RHD. The MK I's are the best to convert. Same goes for converting to LHD. The bulk head is the same on both sides...pedal box location, colunm hole, throttle, etc. The MK II's will require more work, as the locations will need to be punched. You will find the the fasia will be the big problem. Later B's came fitted with three different designs. I would think that you will find late model RHD GT's right up to the finish of production in the UK. If I was to have a RHD GT, it would be fitted with a Rover V8. I already have two RHD motors and do not have any issues...actually like them as I am left handed. If you purchase a TC, Paul you will not have any choice but RHD.