Vintage Cars: 1967 300 deluxe convertible, chrysler mercedes, vin search

Question
QUESTION: I bought a 300 deluxe convertible how rare are these cars and how many made? any  info appreciated thanks

ANSWER: there are several 300 Delux autos from the 60's which one are you talking about
Cheverolet?
Chrysler?
Mercedes?

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QUESTION: it is a chevelle with a v8 engine

Answer
rare indeed if it is an original V8.  My records indicate that these were only made in Canada, and 97 were built. You should be able to do a VIN search through GM
Nearly every '67 300 convertible I have seen or seen documentation on has had a six, seemingly always the optional big 250.
Good Luck