That tells you that something isn't straight. I would change sides if it's not to much trouble. I want you get all the bugs worked out, as soon as the weather gets better I will be doing mine. Make sure that there is nothing on the axle mounting surface and on the inside of the rotor. If the parts house where you bought them turns drums (Kragen, Oreillys) they can put it on the machine and tell you how much it's out.
86 CJ7 5.7 vortec. 4L60,D44's,OBA,Air tank bumpers w/D rings detroits,4.88,35" bfg, mt's 9500ti warn
86 CJ7 2.5 detroits, OBA 4.56, air tank bumpers, w/D rings,9500I warn 31x10.5x15, Trxus
86 CJ7 bone stock, w/factory 44 never seen the dirt soon to be for sale
87 Wrangler also never seen the dirt.