Help with decking or not?

You've got one corner at 9.600, and an opposite corner at 9.601......have your machinist could pick up the corner at 9.600, make a sweep to bring the rest of the deck down, likewise on the opposite corner, start at 9.600 and make a sweep. Weather or not the block would square with those cuts is a different story, to square the block could take more of a cut, depends on how far out of square it is. If I had a choice between just even deck height or even deck and square, but even deck and square throws me off someplace else, I'd just go with even deck. It's not the end of the world if the block isn't square.

OR, go ahead and take minimum cut to deck and square and use chamber volume and gasket to adjust for desired comp ratio.