[Healeys] heritage certificate question

[I Erbs]

My car has tags from a BN4, although the engine is a 29D and it has disc
brakes/disc wheels. I was told when I bought it 35 years ago that the tags
came from a scrapped car.
If I send in the engine # to the trust, will the certificate have an
original ID#, so I could make a new ID plate and register my car as a
correct 3000?
The engine # 29D RU  /H9267.
Thanks

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I Erbs
Portland, OR