No fully FoMoCo-made Capri convertible was ever offered, and these McLaren ASC cars were essentially coachbuilt. From Wiki:
This one's an early crash test car, likely among the first handful of pre-production prototypes ever built, presumably almost entirely by hand.
Reads the ad:
"This was a crash test car. No drivetrain, dash or seats. No title. $350 OBO."
It's obviously no good as a car anymore, but if art is (at least partially) defined as something with no practical purpose beyond existing for its own sake, for the reaction it solicits from its viewers, then I think this intriguing old heap fits the definition perfectly. Besides, those taillights have to be worth at least a couple of bucks on eBay.