How much off the block?

In my case the machine shop is located 5 hours round trip from where I live, and the block needs bored prior to mocking up the motor....so. I am in an area where there are a few machine shops but not any that are specialised in performance type motors. The one I am taking my block to told me he was a machinist not an engine builder. He said it was up to me to tell him what I wanted done as far as decking. I am heading there today with some measurements to discus what I want done maybe the block will come home with me! I think I will just have him clean, line bore & square deck the block.