BIG piston deck clearance issue

The joys and mystery of opening up a used engine that's been sitting for who knows how long for what reason.
If the crank is not hurt than just polish it and use it! unless you want a stroker, You can't fix it unless you know what is wrong.
The crank seems perfeclty smooth and the bearings show almost no wear (I'm still replacing them). I might get a set of aluminum heads, but don't plan on stroking this one.