Now my Q is: what are the other things i need to get? What do i need to prepare?
btw, the car to swapped is not a civic. its an asean car that honda built to cater for the market. its called a city. so there's some differences with the suspension and brakes. but basically, installing another D series is a easy as 123.
It's quite a daunting task on a carbed Civic, and that is a car that came with EFI from the factory... let alone a City that never had an EFI version. You'll make more power if you run the y8 with good carbs (Weber, Mikuni, Dellorto... even bike carbs on the runners of a hacked up stock manifold). It'll be not unlike an ITB setup, but without the hassle.
Unless you go boosted, I see a set of decent carbs as the better option tout court. (excuse my French, I don't know how to express that in English... nor in Dutch or any other language, come to think of it :noway: )
You could even get a set of Keihin CV carbs off a D14a1 or D16z1 and use those for a cheap solution. I doubt they'll lose you power, since the D16z1 makes just as much power as a D16a6, and people put z6/y8 heads on the z1 too with good result.