Locomotive assignments during the late 1940s

As I understand it the reasons the 484, 485 and 488 were kept in Alamosa while the other K-36s were sent to Salida in the late 1940s and early 1950s was that they had steam lines for passenger train service. When the San Juan ended in 1951 there was no need to keep the 485 in Alamosa so it was loaded on a flat car and sent to Salida via Pueblo. The 486 and 487 made the trip back to Alamosa through Pueblo. The Poncha Pass line was gone by this time.
I imagine that 480, 481, 482, 483, 486, 487 and 489 went to Salida via the Poncha Pass line over time when the great locomotive swap happened.
Does anyone have any additional information on this or information that refutes what I wrote?