1970 340 standard bore bare block

I’ll have to get a close up pic of #5 for you. Im building a W2 340 and I have .040 pistons already that I want to use so I believe he said to me he would recommend to sleeve that cylinder and half fill the block if I was going to make it a race only piece. I have 2 other blocks I’m using one and the other is .030 over already but not selling those. And I had 2 blocks checked so one we called red and the other Rusty. It will clean up at .030