piston help

Blurry...lol. But, measure the piston with a micrometer and see if it's been bent at all. I doubt it as it's brittle and tends not to bend but break. But, you need to verify the dimansion is still sound (compare to non broken others). If it's not bent, I'd dress the edges of the break, and smooth off any raw casting showing to avoid stress risers, and run them.