Great answer and thank you round2K. I see that you are from the same neck of the woods as I am, (Abbotsford here), maybe I can lean on you for advice from time to time. The reason I ask this question was for a few reasons.
First of all I was lucky enough to find a long lost K code fastback, (registered as an A code here in Canada). I was able to register it properly as a K code car and, as a result actually able to find the original owner. He still had the original bill of sale and many pictures of it from 1966 for me to "build the car to." I bought the car July 1st of this year, and was able to trace its original registration through ICBC, enabling me to properly and legally register it as a K code, (1st time its been registered properly since 1971). Obviously all standards of proof had to be met for this process to occur.
I have always been the kind of person who prefers originality over anything else when it comes to classic cars. To me this kind of car deserves to be restored to the condition and appearance that it would have been in when it left the factory. The one thing that bugged me was that my cars original engine was long gone, until I found it last week, (still in BC). That kind of made me wonder, what stops people from re-stamping blocks with the 'correct' VIN and what stops those same people from passing that car with a re-stamped block off as a numbers matching, original car?
I realize that a car does not have to be numbers matching or original to be in the registry. I completely agree with your philosophy that if you do put your car in the registry you should disclose those details to the registry. There seems to be a way that incorrect engines and the like can be disclosed in the registry. I see that if certain symbol appears next to the VIN it indicates a certain thing. For instance a '#' means "transmission only," a '@' means "engine only," a '+' means "body only" and so on. Because there are so few of these symbols indicated beside the VINs in the registry it makes me wonder how much of this information is actually disclosed. I suppose from a legal standpoint its really only necessary to disclose these things if you sell your car. If you were to claim it to be an original engine car and you know or become aware that its not, shame on you.
Thanks for your help!