Are you running a PS cooler?

I had a very successful trip to the PNP yesterday, and found a couple of power steering coolers that had been unhooked and were just lying there so I picked them up. I'm finishing my new power steering pump setup so if I were to add a cooler, now is the time. This would be going on my 82 D150 slant truck. Is a cooler a good idea or necessary? I live in WA so it's not an exceptionally warm area most of the time.

As RRR says, thank you and drive through...