1 | MORX | North American Car Corp. | added 7/1955; 10/1957-1/1975; eliminated 4/1976 | | NAKINA |
2 | MORX | Mather Stock Car Co. | 1/1941-7/1954; eliminated 7/1955 | | NAKINA |
3 | MORX | Mather Stock Car Co. | 1/52; eliminated 7/55 | | NRHS |
4 | MORX | North American Car Corp. | added 7/55; 10/57-1/75; eliminated 4/76 | | NRHS |
5 | MORX | JOHN MORRELL & CO. (NACCO [MATHER STOCK CAR CO.]) | | | PWRC |