2.3 140 ci ford engine lsg-423 according to the valve cover it belongs 1x92 family this is a carburated that in 1984 moble sweeper your question what model year egines wil?

The information provided suggests a 140 cubic inch Ford engine (LSG-423) from a 1984 Mobile Sweeper. The "1x92 family" designation on the valve cover is a Ford engine family code, but it doesn't directly translate to a specific model year range for *all* engines. Engine families encompass engines with similar designs and characteristics used across multiple years.

Therefore, we can't definitively say what *other* model year engines would share that same 140ci LSG-423 configuration. The 1984 date refers only to the specific Mobile Sweeper the engine was found in. Ford used similar engine designs across various years, so engines with similar specifications might appear in vehicles from a few years before or after 1984. To find out other model years this exact engine might be used in, you'd need to consult Ford's historical engine records or a detailed Ford engine identification guide.