I don't know what to think of the whole i.d plate thing as I rang Holden in regards to a so called genuine 5000 that I was set to buy. When the guy asked for the vin chassis number I started rattling off the BLH------ number that was stamped into the body, when he interrupted me and said that it was not the chassis number. As far as any other car i've had, the actual numbers stamped into the body (not on a plate) is the chassis number. Anyway after having an argument with him he said it's the 15 digits starting with 8 (small thin tag)!!!! How hard is it to swap that and the other 2 plates over?????? Not even, swap thin one and right hand one that way the number on the left plate and the body stamp still match up!!!!
GMH identifies vehicles only by the VIN (the small thin tag) whilst registration authorities use the chassis number. The difficulty today is that GMH do not have any records linking the VIN and chassis numbers
Consequently a GMH confirmation letter can tell you no more than what the tags were attached to 30+ years ago. In Victoria the old Vicroads registration cards had the chassis number and engine number recorded and these details are now held by the Association of Motoring Clubs (AOMC) It is therefore possible to check if the chassis number originally had an HT prefix engine number.
The following links may also be helpful.
http://www.gmh-toran...topic=3669&st=0
http://www.holdentor...com/lookup.html
Ok, now to make it even more confusing here are some factors that could come into play.
You say that rego authorities would have that info but it sounds like that varies from state to state. In SA the VIN/ chassis number was not recorded for cars built before 1984. Both of my Torana's have N/A under that heading. The only numbers recorded are the engine number and number plate digits.
From what I have heard as well, in the eastern states if a car is stolen/recovered it is allocated and stamped a new chassis number. But that is just what i've heard.
There is also the 'con man' factor where someone has tried to make an A9X,etc out of a sunbird,etc by diddling the plates and changing some parts of course.
Then there is REDA9X's reply where a car involved in an accident could have had a chassis rail replaced.
Like I said in earlier post, it is very hard to find a 'genuine' car nowadays.
Do you have the original owners manual? The cars details with all the numbers should be recorded in the front cover.