[Ford of France]

Forget the uniquness of the carbs, how about that intake manifold. Wow. That would have taken some incredible fabrication. I would bet that the main jets are pretty lean on both ends and that the chokes are 37mm. While the downdraft Webers look like 48 IDAs, the DCOE sidedrafts look pretty small. Note the air horn difference between the two carburetors. I wouldn't be surprised if they weren't something south of 40mm.

Impressive picture. "She's real fine--my 409".