Smog Pump Date Code

**Bill Pritchard** · #1 07-09-2025, 09:19 PM

Quote:

Originally Posted by daveg

Alwas thought the"1S" suffix meant Chevrolet?

Could be. Obviously both of yours have that, mine has it, and one that was just sold on this site also has it. Thanks for the pics, Dave

**Hawkeye** · #2 07-10-2025, 02:11 PM

Per CRG:

**67since67** · #3 07-10-2025, 07:20 PM

That's great info Marty!
Here's an example of a '67 pump, note that the "0" is lightly stamped.
054th day of 7 with a Tonawanda stamp of T0330

The Following 4 Users Say Thank You to Hawkeye For This Useful Post:
1969L78Nova (07-10-2025), 67since67 (07-10-2025), Bill Pritchard (07-10-2025), DAVE H (07-10-2025)

The Following User Says Thank You to 67since67 For This Useful Post:
Bill Pritchard (07-10-2025)