Idle went nuts.

Check the valve seats and valve face on the effected cylinders, then if they are good and the cyl walls aren't all gouged up, put it back together and drive it.

Should I take the head to a machinist to check for cracks? Also, if the valve seats are beat up, is that something that can be repaired?

Do you think I should pop out the #1 and 3 pistons to make sure a rod didn't get bent? I'm thinking especially about #3, where that not-compressible nut was bouncing around.