an integral part of the saint project is the 'atlantic option'. although it is intended by the saint project that the completed engine will run primarily in its 4-6-0 configuration as a saint because of the plan to go mainline, it is planned to have the engine run for a period during its 10-year boiler certification as a 4-4-2 atlantic. the number it is expected to carry when converted into its 4-4-2 atlantic form is 191 and the names include "atlantic" and "churchward". this mirrors the original saint class of which 13 were built as 4-4-2s for comparative purposes and later converted to 4-6-0s.