741 to 489 center section swap

i just bought a 8.75 355 suregrip with 489 case, the open end case in car now is 8.75 741, i know i will have to get the u-joint with 2 different sizes on it, but will i also have to switch the clamps that go around the bigger cup and where could i get joints and clamps if i have to switch them to? thanks