1969 Dart Pro touring daily driver **Crashed**

I received the wheel bolts (was missing 10 for the front after the bolt pattern conversion) and the v-belt to replace the one which I recently noticed was a total disaster, it was super old and dry rotted as you can see.

The freeze plug which I had suspected to be bad (and turned out to be) was in a very easily accessible place which is the reason I left it when I had the engine out. It was at a low part in the engine and I was surprised to see just how much water stays when you empty coolant from the radiator, always thought when you empty it it is pretty much emptied. There was however alot of rusty goop gunk right behind the freeze plug which I cleaned out.
..Is this normal?

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