These are an updated version of the GE floating bolster design used on their earlier export models, but look to be slightly beefier. They are modified to use a span bolster, and were used on new GE B+B-B+B models as well as conversions of used xUS GE and EMD six axle units converted to meter gage. EMD has a newer fabricated B+B-B+B design on their current meter gage model, versus the D-D flexicoils previously used on their DDM45.
I also found pictures of the 802 and 803 - one has the rubber swing bolster truck (interim design between the fabricated truck and cast floating bolster designs; common on Brazilian U5
and the other has the later fabricated truck with a single drop equalizer and row of springs. Evidently the trucks got swapped around on these.