Assuming the bolt can be removed,And in the very same line of thinking, if I do have to drop the motor, it would be easier to pull the heads then.
Also if the motor is toast I'll need a kit for it's replacement anyway.
So another six of one, a half dozen of the other, or which came first the chicken or the egg?
I'm not one to reuse a timing belt or tensioner. Especially if it were tested on a broken motor (that's me). I'd reinstall a water pump with a new gasket.
I'm not exactly fond of the idea of reinstalling heads. I'd be mad at myself if I removed and they were ok, especially since the head bolts are TTY. 🤦♂️ ugh. It's a tough call, but my gut tells me there is bent valves, especially with a broken idler pulley and bolt. That takes some serious force to cause.