Stock would be 4:88 or 5:38. Again, many times with a drivetrain swap comes a gearing swap. I would suggest dropping one (or both, no reason not to insure the ratio's match and do a damage inspection) of the covers and do a tooth count to verify. Might not be a bad time to put some clean oil in there.
FYI, the front knuckles take oil as well. Many times the seals go bad and the oil leaks out, leaving the joint and bottom kingpin bearing dry. If you happen to fill them and they do leak, the seals are cheap and a 50/50 mix of oil and grease in the knuckle will insure a good seal.