Jim Clark did have a small mouth TR3 for a while. I was told by a local farmer who used to know him that it was an ex-Scottish motor show car and had various parts polished and chromed under the bonnet. As far as I know it has been lost. There was an advert in the early 60s for it in a Scottish Borders newspaper, but no one knows where it is now. I think he did a couple of hill climbs in it, but it wasn't a specially prepared car, and I don't think he used it for any races. There is a picture of the TR in one of the books about Jim Clark. I am sorry I am not sure which book, though! I do remember that the car had an Edinburgh registration number, though.