I recently bought a Series iii pickup (manufactured 1975 and first registered 1980) and the chassis number has a 911 prefix, ie a petrol model. It's not though, it's a diesel and the DVLA have it listed as a diesel. It's not a 300 tdi conversion or anything like that, it's a 2.25 original series diesel. Have I not been vigilant enough when buying this and bought a dubious one? Thanks so much.