Broken Rocker Shaft Bolt Removal

I don't know if it's so bad
I sprayed water in the top of that hole and it leaked out through a valve
So, I don't think that hole is connected to a water jacket.
But yes an intake/exhaust leak is bad
But not as bad as that water leak
Does everyone agree?

It's hard as I don't know what to find a set of sub $500 heads for LA motors.
So, I'm trying to salvage what I have.
It took me a year to find these.
I know they are in the classifieds on here and such but the SHIPPING is what kills the deal
Then another $250 to go through them
It adds up