Rebuilding Original Engine 383-s Fastback

If you're not going to deck the block or heads, you have no reason to worry. There's no piston that will get you anywhere near 10:1 without blueprinting and milling. The problem is not the pistons. It's the block and heads.
In terms of numbers - if you use a shop with modern equipment the numbers are not at risk. I've done several without touching the ID pad. You just have to have the right machinery and/or a guy that knows he has to keep them.