Piston to wall clearance and material play a big part in how tight you can run it. Cometic has a .027, .030 and a .036 compressed thickness. I'd recommend the .036 for your application. I'd rather have 040, but you'll have to cut the block and cut 7 of the pistons. Though you might try switching rods on the 008 and 016 cylinders to try and get them closer.
I know it's a lot more work, but I would rather have it the way I want it than assemble it as is and not be happy. Though you could run 030 gaskets if switching rods gets the two odd balls back in the same range.