the ZC motor is kind of a rare one, so its a little harder to get stuff for them. the D16Z6 and the D16Y8, the SOHC Vtec units are easier to do up purely because our friends in the USA have had these motors for a while and know all the tricks to making them put out harder and also pioneered most of the mods for this model motor.

also as far as i know the mini me swap is only possible for the SOHC D series motors and the B series motors. appaerently you can't put on a B series head on the D series ZC motor just because they are both DOHC.