This is interesting, something I have not seen before...  I recently acquired a early series 1 240z parts car that is very original, and have been disassembling it in my spare time.  It was too far gone rustwise for any thought of restoration.

Today, when removing the splash pan, I glanced at the front brakes and noticed that the dust shields have a air scoop to aid in cooling.  Has anyone ever seen this before or have any insight about them?

Maybe in its early life it was owned by John Morton, lol

 

I think that it is Nissan original, I've seen it described.  Maybe even in the FSM.

Looked at the 1970 FSM and these drawings/pictures came up.

Yes, early S30 brake backing plate.  Notice that the rotor is vented also.  Let me know if you want to sell anything.

Thanks for the info..   I pinged one of our local club member last night who knows early cars and he confirmed they were factory parts.

A number of the parts will be going up for sale later this week.   Many are in amazing condition.