Anyway, when you're talking French cars that really just don't make sense, you need to start talking Peugeot. I've owned a 504, but that car was just far too reliable (and considered semi-desirable by "normal" car freaks) for true GP status.
What I need for my personal fleet is a Peugeot 604!
The Peugeot 604 was based on a lengthened 504 chassis and shared the 504's doors for good measure. Peugeot, at the time getting ready for its nose-dive into French-government-backed takeovers of Citroën and Chrysler Europe, dropped the troublesome PRV V-6 engine in the 604, then added a dash of Pininfarina styling. The result was an interesting-looking car that provided a super-comfy ride, rusted in a hurry, and tended to develop costly engine trouble.
I figure, hey, any 604 that's survived this long must be a lottery-winner-grade lucky survivor with an inexplicably bulletproof PRV. If I buy one (which is a big if, given that 604s in North America are about as common as showroom-condition Hyundai Scoupes), I should be able to count on it being as trustworthy as Grandma's '67 Plymouth Valiant. Right? Yes!