SSW 6510-6519
These units were built as SSW units and renumbered as part of the SP's 1965 systemwide locomotive renumbering plan. They retained their Cotton Belt identities.
1965 NUMBERS:
SSW 6510-6519:
| 1965 road number | Orig. road number | notes |
| SSW 6500 | SSW 760 | |
| SSW 6501 | SSW 761 | |
| SSW 6502 | SSW 762 | |
| SSW 6503 | SSW 763 | |
| SSW 6504 | SSW 764 | |
| SSW 6505 | SSW 765 | |
| SSW 6506 | SSW 766 | |
| SSW 6507 | SSW 767 | |
| SSW 6508 | SSW 768 | |
| SSW 6509 | SSW 769 | |
| SSW 6510 | SSW 770 | |
| SSW 6511 | SSW 771 | |
| SSW 6512 | SSW 772 | |
| SSW 6513 | SSW 773 | |
| SSW 6514 | SSW 774 | |
| SSW 6515 | SSW 775 | |
| SSW 6516 | SSW 776 | |
| SSW 6517 | SSW 777 | |
| SSW 6518 | SSW 778 | |
| SSW 6519 | SSW 779 |