No compression-next move?

If it were me, I'd mock it all up again and measure valve to piston clearance to know how close they are. Kind of looks like it was kissing that piston for a while, although I could be way wrong on that.
Either way, as RustRatRod said, must at least check those valves.
No matter what, I'm so glad it did NOT have a catostophic failure with more damage. You dodged a big one this time.