What to do with a blown 360?

If it was just a head gasket, I would just redo the gasket and let her rip.
Of course you'll need intake gaskets....
Check you oil and see if it turned into a milk shake. (Coolent in the oil.)
If so, you'll have to clean it all up and run through a few oil changes to clear it out. Remove the rockers and clean them
Up.

Do you know why it blew?