At the OKC Train Show last weekend, picked up a book by Steve Goen - "Santa Fe in The Lone Star State Vol. One 1949-1969"...… All FT units shown are all in freight colors, none in the Warbonnet paint scheme. Of interest, some were refurbished in the late 1950s and renumbered 400-430. Santa Fe had a total of 155 cab A units, 165 booster B units. By 1966 the use of FTs was no longer happening in Texas. The most common lash-up of FTs shown is ABBA, although there are also ABBBA, ABBB, one is FT 126 ABBBBA. Perhaps the most unusual is FT 121 with ABBA-GP7-BBA in July of 1960. As stated by Hotwater and LAIDOFFSICK, and others above, it all depended upon the power requirements.
Jesse TCA