What would you do? I broke one top ring.

Wouldn't matter if you didn't break any. Once you take the pistons out you are commited to replace the rings. You will never get those rings back to where they were seated. Get a ball hone scratch the bores and replace all the rings. Also while its apart check the trust bearing play and plasti-guage the rods and mains . Replace the Core plugs and oil pump.melling $32 dollars its a no brainer. Then you know its fresh again.

No matter what any one tells you never reuse rings. I learned that when I was 12. Also end gap the new ones going in.