The real question is are they original to the cars refered to and are they restored pieces or are they original paint unrestored pieces ? Are they restored cars? Are they original survivor cars or are they cars that could have had these pieces replaced? Lots of these cars had their original parts discarded and then another owner gets the car and searches out peices to make them whole again and or makes up pieces to look correct. The dates are paint and can be restamped easy enough. Hell if your good enough you can repaint the air cleaner and refinish around the date stamp and it can be done without detection.

Greg

 

I can't speak for Joe but I know for a fact mine is from a 70 W-30 and dated 343 69 and has the hole. I need to look at the one on my Rallye 350, It is not the original to the car but it may still have the date on it. It was removed from an original Rallye 350.

 

My '70 w ca emissions has the hole but nothing in it, anybody know what was in the punched hole, guessing it went to charcoal canister/

 

The entire NA9 system is shown in the 1970 Assembly Manual.

The option primarily consists of a gas tank venting system, with some sort of contraption mounted back by the tank and a charcoal canister under the hood. And lots of hoses.

The charcoal canister has three ports, with one port connected via hose to the snorkel mouth. A ~45 degree elbow (p/n 3967086, Conn Asm Air Cleaner Purge) inserts into the 1/2" hole in the snorkel, attached with a clip (p/n 3977168).

This connection is the same for both single- and dual-PCV systems. No mention is made of OAI, but since most dual-PCV cars were OAI, I'm sure that the California OAI cars used this, too.

There sure are a lot of bizarre little parts needed for the NA9 option. For example, another port on the charcoal canister has to tap into the hose between the PCV and carb. On dual-PCV systems, this hose is only about 3" long, so it is replaced with a rubber "T" with the charcoal hose clamped to it. Good luck finding one of those rubber T's today!