Steve told me to not use synthetic fluid, outside of that he said any power steering fluid is fine.
I would use the ACDelco brand power steering fluid honestly. Using valvoline PS fluid and I have been having problems trying to get my steering to be quiet and silky smooth like it was when I had Royal Purple in it, BEFORE the rebuild.
If your old pump goes out, have it rebuilt by LEE. I would add a cooler too. I have a thread on that.
In your case, I would go get a 2 or 3 quarts of power steering fluid, then bleed bleed bleed. Cant really bleed enough honestly.
I think my gear needs to be rebuilt as well now so maybe thats my problem. Or maybe I ruined the pump by boiling the fluid 3 days after I reinstalled the pump. Its costing me way to much money at this point. Hence why I recommend to you to install a cooler..
94 RMSB 170K Sat 5 years, ran for 1 of those then remained untouched for 4. Sat because it was slapped by a deer and the owners didnt want to fix it for whatever reason.
Mods, all the free good ones.
Future? Probably pull engine, reseal it, and run it a lot more. Looking to get 250k out of it. PRAYING for 300k.