I would CC the heads. That's the only way to get a guaranteed answer. Besides, if you're going to do any work to them, you will then have to mill the head to bring the compression back up anyways. So you'll want to CC them anyways.
The 1.88 J heads were cc'd twice; first time when the engine was built years ago; they were all matched at 67cc's.
The 2.02 X heads have never been cc'd or touched. Just trying to figure out which heads to use on the new build.