Just a question, but if they're hinged at the top won't they bounce all over the place when you're going down the road? (Unless they're heavy enough to stay put.)
No Speedy,
They are anchored at the bottom with quick release pins (similar to hood pins) You can see them pretty well in the pic of the orange car. And...if he fabs these out of aluminum, maybe they should be powder coated? :finga:
I had a 78 280Z w aftermarket aluminum louvers. (sold it to buy the 68 cuda) They were simple knife-hinged at the top and had little latches at the bottom that opened with a cheesy flat key. It turned 180 degrees to open and turned the other way to lock. The hinge feature is so the glass can be cleaned when you wash the car.
The WPC newsletter that had the 67-69 Barracuda story in it showed a 67 B-cuda FB that had rear window louvers, obviously aftermarket. The idea was good but it looked really bulky from the side.