I have a 1971 VW camper van and the vin plate behind the drivers seat is missing. The reg plate comes back a 1971 when I checked it. But the big problem is the chassis number back by the moter says its a 1973 and this number does not match my registration which says its a 1971 as well. Any ideas has the back of the bus been replaced?? I am trying to get an MOT at the moment and they wont do it the way is is.