Q-Jet Mystery
 

OK at 1st glance on the new to me 67 Sprint Firebird it looked to have the incorrect Q-Jet installed, it looks like a 68-72 Chevy style housing with the stamped part number, not the round tag but after looking up the numbers stamped into the body they seem to indicate a 67 Pontiac California Emissions automatic carb? Almost correct as the car is a Manual.
The car was assembled in the 3rd week of June 67, so it would be a late production car. Did they start using the 68 - 72 carb bodies before the end of the model year? Or is this a restamp or service replacement?

Sorry to poo-poo on what seems like a mystery.

This looks totally legitimate, all day long.

The OHC sprint Quadrajets used a fuel bowl with a side outlet filter - these are the only Pontiac Quadrajets to do so.

That particular Quadrajet is a service replacement;
The second line date code reads: 0364
That date code translates to the "thirty-sixth day of 1974" (5th of February 1974).

I have observed that in some instances the service replacement carb sold by GM some time immediately following the car's model year was one which was stamped with the automatic transmission application code;
Some great examples are:
1968 Ram Air (all) = 7028276
1969 Ram Air (all) = 7029270
1970 Ram Air (all) = 7040270

Good to know, I was suspecting it was a SR carb. But I am not a Q-jet expert, I know just enough to be dangerous with the numbers. I had just never seen a 66-67 Q-Jet with the numbers stamped on the main body before. I am well aware the 66-67 Sprint Q-jets used the side fuel inlet like a Chevy. The 68-69 version have the straight fuel inlet like a standard Pontiac Q-jet.

Thanks for the input, any knowledge is welcome! So it may be a legit SR Carb.

Jeff,
I have that number listed for;
1967 F-BODY 2nd Type. AT, with A.I.R.

On my tag chart, it's listed as California "GREEN TAG" sorry no other info.

MT I show as 7037269

So looks like somewhere in its life, the carb has been changed.

Thanks Jeff, that is what my research indicates also. And thanks to unrahjonny pointing me towards a service replacement part made 2-1974 it would explain the later style main casting. What was throwing me off is the stamping on the main body like a 68 and later carb. Not the round stick on tab of the 66-67 carbs.

Reading up on what little I can find about SR Q-jets they all used the main casting of the year they were made, not the year they were made to replace. And they mostly made automatic SR carbs so it is not unusual to find a manual trans car with an automatic SR Carb installed.

So I think the mystery is solved. If I find a 67 A.I.R Q-jet I will probably buy it, but it is not something on the top of the list.

Thanks again for the info! As always.

there are many s/t application carbs which were made as service replacements - but those were high volume or what might be described as "bread and butter" engines, not the lower production stuff.
The standard 400/4bbl engine as an example, typically had a SR carb made - but that carb was pretty much used on all but the full sized line with that engine.