Assuming the sensors fit, othwise may need to weld some bungs in. There is a large pipe at the rear of the head then a tiny pin prick in the top of the head, against which the hole in the intake mani seals.
Correct. The Clio 3 ran COP so a mani from one of them may be an option (but harder to get and I'm not 100% on the intake port shape, same for the scenic for that matter!).