Richard, that's a brilliant link. I've read references to GoMoG but never actually bothered to search it, there's plenty of information to be found in there, thanks to whoever built and keeps that site!
Ray, I'm pretty sure it is, but I do need to be careful because there are no papers, and no license plates. I'm still to talk to the actual owner and to hear from him how he came into ownership of this car. It's a RHD, so I'm not even sure if it is a car originally sold to a portuguese client. I need information, both because I'm about to spend money and because I'm not too interested in buying a car with a "lost" license plate.