nothing needed but when you take it off you will see a little hole between 2 of the bolt holes, that hole lines up with a little pin on the crank pully, its so the tdc sensor reads the right bit of the pulley when it needs to. a few people miss it as the pin is so small
It's for a 1.1, but the 1.1 and 1.2 8v are pretty much exactly the same, the 1.2 is a bit taller. Your cambelt cover will be different, but alot easier to get on and off! The design of the cover will differ but the mounting points and bolt holes will be the same.
You'll also have ten times more space than in a cento! So you may find you can refit the lower cambelt cover in from the top therefore not having to take the alternator pulley off first. You may also not need to take the arch liner off, but I would just to see it all better.