it would be easier to just find a d15b7 or d16z6. Swapping a d series head is only a possibility because in the CX about halfway through the batch honda switch from 3 valve reliefs per piston to 4. If you pull the head and find out you only have 3 valve reliefs then youre either gonna have to swap pistons or put the cx head back on cause a 16 valve motor with only 3 valve reliefs per piston is gonna have some piston to valve contact the very first time you turn the motor over.