Only two K-1 class 4-8-4's were built by Angus Shops. They were the only 4-8-4's on the CPR and were especially designed for the heavy Montreal-Toronto night trains. Following dieselization of those trains the pair were assigned to Montreal-St.John NB passenger service however, due to a design feature they were restricted from use in the USA and were therefore operated only as far east as Farnham, Quebec. Later still, they were re-assigned to freight service out of Winnipeg where they were modified to burn oil using tenders off 2-10-4 Selkirks. See below:

Shown at Winnipeg in freight service a sadly neglected looking engine near the end of its working life.
August 16,1959 Bud Laws Collection
NOTE: Both locomotives were preserved, 3100 at the National Museum in Ottawa and 3101 at IPSCO in Regina, Sask.