ZC is a 14 year old engine, so anything sitting around that long gets messed up. Plus their sensors get broken from being taken out of the car and left on the ground. I've never heard anyone having a ZC and not having to replace a bunch of stuff on it.

As for B16A why would you need a new clutch? You need a B-series tranny, its not like you can use your old D-series one. And I don't think they would come with bad clutches.