Here is one in a KB10 belonging to one of our members. I believe it was photographed at the Nationals.

If the owner wishes to be identified, he can make himself known & thanks to Benny for the picture.
Coming from a front drive car, I'm guessing that the air cleaner was a bit cramped for room, so the slope on the side of these covers was probably to provide clearance for it.

Clearly these have shown up in Australia, so I am surprised that there are not more of them around on our beloved Datsuns.

































This is 1200GXmans new cover.
Interestingly, all three of these covers in this thread are on twin carb engines, but only 1 is on a street car.