rear differential questions

[mechanic350]

ok so i am looking into rebuilding my 12 bolt with a few goodies inside. so far i have had some difficulties locating the right axles. from what i can find it should be a 31 5/16 axle length but i have found some that are 31 7/16 long. not sure if it will be an issue but it could pose a problem. also the moser axles I'm looking at have a .530 knurl for the wheel studs but those studs are only 1.5" long. i would prefer to run 3" long studs but they are a .630" knurl. i think i should be able to drill out the stud holes to accommodate the larger knurl but i don't want to screw up perfectly good axles. any help that can be given would be great.

and for anyone that reads this my parts list so far includes the following: detroit truetrac limited slip Diff (913A315), Moser engineering Diff cover (7111), Moser Axles(A30-70GMT2), richmond Gear 4.10:1 (RMG-6902041), richmond gear ring and pinion install kit (RMG-831018B), Royal Purple 75W90 (01300), yukon gear and axle install kit (14068) and then the studs in question moser engineering studs 1/2-20x 3in long .625 knurl (8010)

and the double up of the install kits is for some spare parts just in case things done go according to plan.