Sounds like the machinist is through with the block, so please answer a few questions so I can keep up with your build and maybe make recommendations....
1. block deck height
2. pistons used (please post ALL info on the pistons)
3. piston deck height (I'll figure this for you if you can get the info in 1. and 2.
If you plan to assemble the motor without knowing this info, then you AND your machinist have screwed the pooch.
Is there any chance at all that you have cc'd the chambers?

I can DynoSim several combos for you if I have all the info.