[olddog]

Anti-freeze pouring out both mufflers?

If side pipes and no cross over, that would have to mean both head gaskets failed at the same time. Again if the exhaust is separate for each side of the engine, I would look for a common failure to both sides of the engine - the intake manifold gasket.

When a cylinder fills with water, the engine is locked up. I don't know if your starter has enough torque to bend a rod. I have heard they can.