He was not appointed to cabinet in the legislative term which followed, although he served as Deputy Speaker for a few months in 1971.
[1] Boyce was re-elected in the 1977 election,[1] defeating Tory candidate Philip S. Lee with a reduced majority.
In 1979, he supported Sidney Green's unsuccessful bid to become interim leader of the provincial NDP.
On March 3, 1981, Boyce announced that he was joining Green's new Progressive Party of Manitoba, along with fellow New Democratic MLA Ben Hanuschak.
He ran for re-election in the redistributed riding of Fort Rouge in the 1981 election,[1] but fared poorly, receiving only 243 votes.