Many times yes it will. It all depends on how long the fire lasted and how hot it got. I have had engine bay fires last only 8 minutes and damage the gaskets : head oil pan, valve cover". If the fire got hot enough to melt the intake, then more then likely the enigne will need to be torn down and all new gaskets installed.
I would also replace all the bearings in the engine as they are made of copper, in most cases and this would have a much lower melting point then the alluminum intake would.
the temp was around 660 degress and was put out with water. lingth of time unknown.
Yes the cast steal should not have been damaged, so replaceing the bearings and gaskets and seals, should get her up and running again so she will be reliable.