B unit
Starting in 1968 as the centercabs wore out, they were replaced by a series of F7 units, all of which came as trade-in units from General Electric. Through 1972, a total of eight units were purchased, including one B unit (for parts) and an FP7A. Only two were retained by the WA&amp;G; all others were transferred to the Louisiana &amp; North West Railroad, another Salzberg line.