MP 600-643:
With the pending acquisition of MP's GP15-1 fleet numbered from MP 1555, the MP elected to renumber many of its remaining GP7's numbers in the MP 1600 series to make room for new arrivals. The easiest way to accomplish this was to just remove the leading 1, thus renumbering them to the MP 600 series. Here is a listing of known renumberings.
MP 600-643:
| 6xx series number | 16xx series number | 131 series number | original number |
| MP 600 | |||
| MP 601 | |||
| MP 602 | MP 1602 | MP 172 | MP 4171 |
| MP 603 | |||
| MP 604 | |||
| MP 605 | |||
| MP 606 | MP 1606 | MP 176 | MP 4175 |
| MP 607 | |||
| MP 608 | MP 1608 | MP 178 | MP 4177 |
| MP 609 | MP 1609 | MP 179 | MP 4178 |
| MP 610 | MP 1610 | MP 180 | MP 4179 |
| MP 611 | |||
| MP 612 | MP 1612 | MP 182 | MP 4181 |
| MP 613 | MP 1613 | MP 183 | MP 4182 |
| MP 614 | MP 1614 | MP 184 | MP 4183 |
| MP 615 | MP 1615 | MP 185 | MP 4184 |
| MP 616 | MP 1616 | MP 186 | MP 4185 |
| MP 617 | MP 1617 | MP 187 | MP 4186 |
| MP 618 | MP 1618 | MP 188 | MP 4187 |
| MP 619 | MP 1619 | MP 189 | MP 4188 |
| MP 620 | MP 1620 | MP 190 | MP 4189 |
| MP 621 | MP 1621 | MP 191 | MP 4190 |
| MP 622 | MP 1622 | MP 192 | MP 4181 |
| MP 623 | MP 1623 | MP 193 | MP 4182 |
| MP 624 | MP 1624 | MP 194 | MP 4183 |
| MP 625 | MP 1625 | MP 195 | MP 4194 |
| MP 626 | MP 1626 | MP 157 | MP 4278 |
| MP 627 | MP 119 | T&P 119 | T&P 1119 |
| MP 628 | MP 120 | T&P 120 | T&P 1120 |
| MP 629 | |||
| MP 630 | |||
| MP 631 | MP 1631 | MP 123 | T&P 1123 |
| MP 632 | MP 1632 | MP 124 | T&P 1124 |
| MP 633 | |||
| MP 634 | 1634 | MP 94 | C&EI 230 |
| MP 634 | |||
| MP 635 | |||
| MP 636 | |||
| MP 637 | MP 1637 | T&P 97 | KO&G 801 |
| MP 638 | |||
| MP 639 | |||
| MP 640 | MP 1640 | T&P 100 | KO&G 804 |
| MP 641 | MP 1641 | T&P 125 | T&P 1125 |
| MP 642 | MP 1642 | T&P 126 | T&P 1126 |
| MP 643 | MP 1643 | T&P 127 | T&P 1127 |