You will find that often, to obtain your desired deck height, not only will the block need to be final decked by some amount, but most if not all of the pistons will need to be cut on one or either side as well to equalize them for zero or whatever you determine to be your objective.
Yes, to obtain a zero deck on all 6 pistons correctly, it will be necessary to cut the block and/or most of all of the pistons using the methods I have described. You will find that just checking the pistons at the center of the cylinder, as most all people only know to do, they really aren't even getting as close as they think to obtaining it.
