Several variations in the nose emblems used on yellow warbonnet 325's emerged as these units were repainted over a period of time. Some units (334, 340 and 341) had a solid blue emblem with a blue stripe running up and over the headlight to the base of the windchield as well as below the emblem. Others (326, 339, and 341) had an outline tpe nose emblem with solid blue stripe up and over the headlight. Another variation was found on 328 with an outline emblem and blue stripe above the emblem bun not below it, and 331 and 333 had a solid emblem with no stripe. Renumbered units 346 and 347C had an outline type emblem with no stripe.

The 325 class dwindled in numbers into the late 1970's as more of the A-units went into the CF-7 program and B-units were retired. F-7A 347C (originally 39C) and F-3B (originally 35A) were saved and stored at Albuquerque with the rest of the Santa Fe's historic lovomotive collection. Eventually donated to the California State Railway Museum at Sacramento, they are on dispaly having been cosmetically restored to the red warbonnet passenger paint scheme, the only remaining Santa Fe F-units.

Mostly in 1969, seventeen B-units from the 16, 37 and 300 classes and nime from the 200 class were rebuilt into radio control equipment (RCE) cars numbered 10 through 35. The carbodies were gutted, traction motors and fuel tanks were removed and ballast was added to compensate for the weight of the removed equipment. Radio receiver equipment (used in mid-train remote controlled helper service) was installed allowing a tranmitter equipped locomotive on the head end to control the mid-train helpers without a crew on board. These RCE cars remained in service until locomotives with on-board receiver equipment eliminated the need for separate RCE cars and they were then scrapped. All were off the roster by the end of 1982.

Fourteen B-units, one from the 200 class and 13 from the 16 and 37 classes, were converted to road slugs in 1972 for use in potash trains originating in Calsbad, New Mexico. Diesel engines, generators, fuel tanks and all other equipment was removed from from the car bodies and concrete ballast was added to compensate for the lost weight. The traction motors were retained and drew their power from a powered control unit that was mated with the slug. Six 200 class F-7A's were initially equipped as the control units for the first six road slug conversions but they were replaced by CF-7 control units after about six months of service. The balance of the road slugs had CF-7 control units from the time they were placed in service. After several years of operation, the road slugs were retired and scrapped - all were off the roster by early 1983.