Later that year in November, Simulambo was in the Zambia B’’ team that travelled to Tanzania for a tournament to mark that country’s 10th independence anniversary. He made his full international debut when Zambia eclipsed Nigeria 5-1 in a 1974 CAN qualifier in Lusaka, on their way to a 7-4 aggregate victory that qualified them to the CAN 1974. He featured for the ‘B’ side again at ECA 1973 in Uganda as well as World Cup qualifiers against Zaire and Morocco and did enough to get a call-up to the CAN squad where he played in all the matches as Zambia went all the way to the final.