How much off the block?

I am taking my block to the machine shop on Thursday. My question is how much should I have him take off the block. My combo adds up to 9.583 that should make the pistons down the hole .017 considering stock height of 9.600??? I am running the 71cc j heads. I talked with the machine shop and he wanted to know how much I wanted off the block.....help! Should I have him take off the .017, or less?

Thanks