Thanks for the response. I found a spec on the compressor itself that said 150 cc of oil. However, AllData said to use 70 mL of oil when replacing the compressor. I figured that they assumed there was some oil left in the rest of the system, so the 150 must be for the entire system. So that's what we used. (150 mL is just a tad more than 5 oz)
It seems to be working pretty well, so I'm happy! It's been in the upper 80's and 90's the past few weeks and I've been miserable all summer, so I'm glad to have it working!
Now I just have to find a quiet bearing for the tensioner pulley...