[Mike_The_Grad]

In case anyone is still interested. I have been able to get better results with the 1406 carb setup after I purchased Calibration Kit #1487.
I'm thinking I may have the wrong PCV valve as I can hear it actually sucking air into the base of the carb as I'm driving down the road. It is the 90° type with a plastic barbed connection. I changed the primary metering rods and went to the next strongest set of step-up springs(Orange Vs. The Yellow factory ones.) It is definitely better. But it is still running lean in the "cruise" mode. It took longer for the temperature gauge to rise above normal operating temp. But it did rise. I also moved the accelerator pump linkage back to the middle hole in the accelerator pump arm. I'm hoping to resolve this lean condition with another rod change instead of a jet change. So as to avoid removing the airhorn. Will check back with results. Also, if anyone knows of anyone with a usable quadrajet main body casting#7042910 I'm interested. Thanks.