George - maybe not the worst, but it certainly makes the top 10!!! It came out in 1975.
The lean burn carbs were calibrated at about 18.2:1.
Carter told Chrysler if these were to work at that A/F the temperature of incoming air to the carburetor for idle must be controlled.
Chrysler had a snorkel with a trap door controlling the source of the incoming air for temperature purposes, that was controlled by a special valve.
The reliability of that valve resembled voting in Chicago (vote early, vote often). In the case of the valve, it was fail early, fail often.
The O.E. Chrysler carbs are best left to the Chrysler enthusiasts unless one stumbles across some at a swap meet CHEAP. Some came with brass (preferred) floats, others came with foam floats. The Chrysler versions (other than the 1971's) can act as donors for metering rods, floats, and maybe some other parts for the 9000 series aftermarket units.
Jon
