fuel

wondering if any one has an arb locker in their dana 80 with 3.54 gears I need A new carrier mine is shot catastrofic failure. i ordered an rd80 and new ring and pin on friday and saturday I looked at the parts list for that carrier on the arb web site and it says that that carrier is for the high side of the ratio spilt? any one know what part number I need. I am trying to figure this out before setting the wrong carrier in the axle housing to reduce down time. the axle in question is from a 94 3500 3.54 open carrier no b.o.m. number left on it.

thank you for the help

ps parts guy looked up the rd80