Jerry's Definative 67-68 z/28 book lists the correct smog pump as 5696104 for the 67 z/28.
Well I have looked high and low and actually came across a NOS in the box 6104 pump. At least the outside of the box had "5696104 AIR PUMP ASSY" on it.
The UPS LAbel was dated May 29, 1973
Inside the box was an AIR pump and the back side of the pump had the casting number of 5696132, which I see cast in all the 67 smog pumps.
It looks like a Julian date of 188? and a D5 on the back side.
This pump has the straight tubes coming out the back
It also has a build date code stamped on it: 2511A
Front side has what looks like a 67 in the middle of a wagon wheel and 5696211.
This doesnt appear to be a pump made in 67, does it?
My question would be - Is this the correct smog pump for a 67 z/28?
I know there are 2 versions of smog pumps for 67 chevrolets. One with straight tubes and one with an angled tube. Both say 5696132 on the back.
So judging by the one I have in the NOS box, the 5696104 pump was just the part number and not the casting number, right?
Here is a pic of the angled tube pump
Which is the right pump and what does the NOS one decode to for date.