H329395 is from a Sept 74 Bris HQ as Ozbox has stated, therefore no vents.

1888 and 15951 is Cotillion White, an HJ colour.

Would love to see the letter that REVS send you regarding reissuing compliance plates :lol:

I think you have the chassis no. almost right EHQ713169B which is in the right time frame

Leroy