[jeffschevelle]

Based on the quantities of the Z16 specific ECL for other Z16 component options in the same book (all of which reflect only 200 units), I believe the 201 in that document reflects the 200 production coupes built at KC plant, plus the one so-called "prototype" coupe built at Baltimore and converted into a Z16 at the tech center and then sold like a demo car. Z16 and L37 are the only two that show 201 units, while the other options show 200. So I believe they just added one to Z16 and L37 when they allowed the prototype car to be sold.

As to the convertible, based on this book's data, it had to be either a tech center conversion done on a 327 Malibu SS convertible, or a COPO order -- Neither of which would show up in this book's ECL tallies. If it was a COPO, it would have been built with one of the approx 20 extra L37 IX engines that were built at Tonawanda.