Is your block freshly bored or has it been used?

If it is used you need to take it to an automotive machine shop and have them check the cylinder bores for wear and taper. They can do this with the block sitting in the back of a pickup truck. Your .030 block may need to be opened up to .040 or even .060.

Trust me. If your cylinders are worn your fresh rings will never seal.

From your other posts, it looks like you plan to buy a rebuild kit with pistons. Don't order anything until you know the true condition of your block.

You should also ask the machinest to check your deck surface. It may need to be resurfaced.

Most machine shops will do these simple checks for free. Another prudent check, which will cost a few bucks, is to have the block mag checked in the areas known to crack.

Be careful about the advice you take from people who know everything and never owned anything.