A ZC is a direct bolt in for an EF. Only thing is if the swap vehicle was a 1.5 originally you will have to run wires and the little control box for fuel injection that comes on 1.6 equipped vehicles. A d16a1 is a "d" series and dohc and 1.6l but they are essentially different animals. The mounts are different and the power out put is much lower in the d16a1.

If your looking for one go with either a ZC (jdm) or a d16a8 (edm)