Used set HyDuty Pistons Part Number 106-.020.  These are 4 1/8" stroke and 3 5/6" +.020 bores.  They were assembled and run.  Some have damage from dirt, some have water corrosion damage.  No skirts are collapsed.  Four of the set are "good", the others range from fair to poor.  They may help a builder who needs less than a set.  Includes four pins.