Here are some pics of what I've found so far. I decided I'm gonna have to take the heads off. The intake ports are extremely filthy with lots of grimey gunk in them, so there may be crap in the cylinders, I don't know. But I'm not willing to chance it leaving the heads on. Also, I don't think I have found every piece of broken chain so I need to drop the oil pan also and just inspect everything top and bottom really good. And clean everything.
This is the driver's head (the broken chain side):
Not much damage at all (except for the grooving), could have been worse.
Looks like the top of the links in the one segment busted off, must have been weak there.
The chains and guides removed from my engine:
