3532, Class GP-35, was built in June 1964, #29122.  It was renumbered 4372 and then became CSX Transportation 4372, Class GP-35.  It was later rebuilt by Morrison Knudsen as slug 2293 on November 9, 1990.

3561, Class GP-35, was built in September 1964, #29363.  It was renumbered 4401 and then became CSX 4401, Class GP-35.  It was later rebuilt as slug 2276.

3564, Class GP-35, was built in October 1964, #29396.  It was renumbered 4404 and later CSX 4404, Class GP-35.  It was later rebuilt as slug 2235.

3567, Class GP-35, was built in October 1964, #29399.  It was renumbered 4407 and later CSX 4407, Class GP-35.  It was rebuilt by Morrison Knudsen on December 7, 1990, as slug 2304.