The OP abandoned ship. I passed the NIASE test for emissions in 1979. Curing the alphabet stew of emissions complaints had to be studied then tested. As a 6-month stint for MoPar line mechanic I have lots of experience with 360 and 440 engines.
That was 40-years ago.
Are any forum members capable of a factory quality rebuilding of a Carter Thermoquad carburetor? Or emissions test qualification? I had access to Factory Technical Tip Bulletins when the carburetor was brand new.
The OP asked a specific question and he specified CO2 not CO. I responded to that question. He since disappeared. Waste of time, except to folks that actually own and use and register that era's motor vehicles. High CO2 is a CLUE to troubleshoot OTHER emissions problems.
I should have known better than waste my time. Shame on me.
