OK, the Lloyd Tuck with Douglas etc living with him is likely not yours. In the 1972 Voters' List, they are living at 4311 26th Avenue SW Calgary. In the 1972 telephone directory, A.L. Tuck is living at 279 99th Avenue SE. The Lloyd on 26th Avenue SW is noted as L.R. Tuck in the same telephone directory.
However, I also note that A.L. Tuck is in Calgary as early as 1958 directories. The 99th Avenue SE is noted in the 1974 voters' list for an Allan Tuck, a librarian, so you can take him of your list. Still unsure what happened to your guy.