When Smith left to join Falkirk in January 1957, Gallacher was appointed as a short-term replacement.
In a seven-week spell, Gallacher oversaw a month which saw seven goals conceded in three consecutive matches within the same month.
His resignation enabled him to concentrate on his other role as an employee of Taypools, which he had been instrumental in establishing.
His son, Ken (1939–2003), became a leading journalist and chief football writer with The Glasgow Herald.
This biographical article related to Scottish football is a stub.