No. Simply remove the 36mm bolt from the fan behind the scroud and the alternator pulls right out. No need to disassemble all that stuff except what is connected to the alternator. The red wire on the alt is hot, so disconnect the battery ground first.
Skipped the part where you wrestle with the fan assembly, especially if the thermostat linkage is all still connected.
For anyone trying to do this in-car, expect to have to lift the fan, alternator, and fan shroud all in one. It's tight, but it will lift out as an assembly. Or remove the 36mm bolt from the fan from behind.
The video was ok got the same alternator setup but little detail about getting the carby n dizzy out of the way than getting the two bolts at the bottom would be great but in all its was very helpful ps in future just some photos of the wires so you dont get lost with the orange wire
You didn't show the vent on the back of the alternator tin. Let people know that it points down. The alternator you fitted needs an external regulator with those three pins on top.