 Kutokana na ushindi huo, Ndugai anakuwa Spika wa sita wa bunge hilo, ambapo wengine ni hayati Adam Sapi Mkwawa kuanzia 1964 hadi Novemba 19, 1973, kisha akaingia Erasto Mangenya Novemba 20, 1973 hadi Novemba 5, 1975, kisha akarudi tena Mkwawa kuanzia Novemba 6, 1975 hadi Aprili 25, 1994. 