2qwik2c wrote:

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They built approximately 80 (16487 only?)1968 Z24 cars @ St Therese . approximately 24 1968 Z24 convertibles were built. Out of those 24 Z24 convertibles 12 were built with the Z03 interior and M20 trans. All info from gm docs.

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 Now that is information we can use! So that means there were 12 Z24 (SS427) convertibles with Z03 (Super Sport interior & wheel covers); and another 10 that were Z24 with regular Impala bench seat interior according to the GM docs you cite.

In '66 / '67 Ste. Thérèse production was all destined for the U.S., probably to counter the cars coming into Canada from the U.S. Ste. Thérèse also painted their cars in lacquer in the U.S. manner. Actually the way to tell is is the number included with the trim tag paint code. A "9" means enamel, a "3" means lacquer.   E.G.  Paint KK 9