frog,
So from the above, a dished piston is better than one that has four little pockets (from a combustion point of view), cos the one with the four pockets would appear "domed" rather than "bowled" ?
No, not quite.
The pockets are a necessity for valve head clearance during maximum lift with some cams such as BD15s etc.
What i am saying, is that if you require a removal of say, 5cc from the piston crown to get the CR you want, instead of literally skimming 30thou of the tops of the pistons, you should have a machine shop machine the tops everywhere so as to retain the original bowl shape and as much of the original height as possible, and thus maintain your original squish clearance. That help?
And yes, one day we will run out of heads
