It's always something of a mystery to me why some BJ8 owners on the forum have not taken advantage of the BJ8 Registry button at the top of the forum home page and contributed the details of their car to the database - even after being personally invited to do so. The registry is not an attempt to invade anyone's privacy. It is an attempt to develop a valuable resource for the BJ8 community by assembling similar details of a large number of cars in one place (8,058 cars worldwide as of today - 45.5% of total original production). This can allow for comparisons between cars, development of statistics that help us learn more about BJ8s, and provision of a source of information that can be of assistance to individual owners in many ways (just ask).
Someone has to receive/acquire, organize, maintain, and use the data for the benefit of the community, and since 1998 I have volunteered to do that as my primary contribution to the cars we all love. I have access to the BMIHT data without having to purchase a certificate for each car, and over the last 15 years I have documented BMIHT information for thousands of BJ8s.
If enough of Hoghead's serial number plate survives to show 5908, then it could only be either 29K/RU/H5908 or 29K/RU/H15908 (assuming the car has overdrive). I have no record of engine 5908, but 5906 is original to HBJ8/31102 (right-hand drive, UK spec car) and 5907 is original to HBJ8/31298 (also RHD).
However, engine 15908 is original to HBJ8L/41342, one of the original Metallic Golden Beige cars (at last report, now painted red). I have a record of this car from two sales on eBay. Actually, I have ALL of the 553 original Metallic Golden Beige cars in the registry because I have the BMIHT data for them.