This looks like a nice project, and given how nice the boxpleat looks, I could believe that mileage to be genuine, potentially! Worth a look for someone on here, depending on the extent of the welding it requires.
http://www.ebay.co.uk/itm/1975-ROVER-35 ... 1c3a397278
http://www.ebay.co.uk/itm/1975-ROVER-35 ... 1c3a397278