AC install
 

Im in the middle of an engine swap on my 960, the donar car has ac but my new car doesn't, how straight forward would it be to transfer the ac over?

I fitted air conditioning to my 740td from parts of several donor cars.

The most difficult part is the wiring - the electronic climate control system (ECC) has sensors in several places. We separated the wires from the donor car loom and made them into a separate loom in my car.

As you have a 960 you may find the wiring is already in place, which will make everything easier. I'd imagine you'll need to remove your dashboard to get the heater box out - that'll take a day to remove and refit.

To my mind it was well worth it to get the spec of car I wanted :)

I found this very useful for understanding how things work.
https://www.volvoforums.org.uk/showthread.php?t=97912

While you have the system pipework apart, replace all the o rings :)

Well that answers that question, I didn't appreciate how involved it would be, certainly couldn't face taking the dash out, I've had the donar car for 6 years and have never used the ac as it needed regassed so I suppose I'll continue to manage without!