A head does not always have to be rebuilt for a head gasket swap.

Valve clatter? Guides going? Are the valves holding clearance?
How many miles on the motor/head?

I'm not a 960 expert... Hopefully 960 will give specific advice

Do you have a shop in mind for the head work?
Finding a good shop is an important step.

I think the most important thing is to test if the head is warped and can even be reconditioned. Tested with a known straight edge along the face. A warped head will put uneven pressure on the cam bearings and equals a dead head.

Then what damage was done to the head surface by the hot leaking coolant, and can that be removed by skimming the head surface??

After that...
Will you regrind the valve seats? Three position grind (better flow)?
New valve guides? New spring retainers?
How are the spark plug thread holes?

Services would be...
Dipped or tanked to clean the head.
Skim or deck the head surface to make it flat again.
Recut the valve seats.
Disassemble/assemble with whatever new parts are needed.

And I'm sure I'm missing something...

Good luck.