[redneckwheelman2]

I would think the bottom end should be fine. As long as the leak is a gasket or head
From the sounds of everything I don't think much if any must of been leaking into the combustion chamber. Chances are the leak will be around where the head bolts go threw the head gasket or intake gasket.
If it was leaking directly into the combustion chamber then you'd of been getting the white smoke and blowing antifreeze out the overflow.
When you reassemble the heads and intake get some thread sealer or rtv on the threads and top of the bolt. All the head bolts are wet bolts and the coolant passages on the intake manifold also has direct holes into the valley.
Just a little extra protection to make sure coolant stays were it should