Gymbo; I would tear that thing down and take a real good look at it.
I don't know how old that motor is not only that If there was no Anti-
Freez in it. The head head gasget could be gone too.
That's where I would look first before thinking the worst.
It's just like Pope said but I would give it a good looking at.
I used to play with the big block dodges back in the day,
but they started getting to expensive for me.
If the block is cracked I wouldn't even mess with it.
Save what you can and toss the block.
We had several 426 hemi's that we tried to have
fixed or welded and all of them would just crack again.
Kurt