I do not know the original deck height.

So, a shop would do it how? Install crank, put piston at TDC, measure deck, remove what is necessary?

I currently have my block at the machinist, but my crank, rods, and pistons here. I'm sending the pistons up to him for boring the cylinders, but I don't have the 250 crank yet. I was hoping to have the block work done, then down the road bring the rotating mass to be balanced.

I should mention my machinist is an hour away. One of the downfalls of living in a small town in the boonies.