I have that vehicle recorded as a 1/76 Jamaica Lime XX7 Sandman van but do not have a VIN for it, just the chassis number (and other ADR plate data) and BODY plate data. It is a 40 year old vehicle and all the bits you mention can be changed or added at any stage in those 40 years. You'll never pick the vehicle by the ID plates though, nor will anyone else, you'll have to go and look at it.