How hard is it to change out a rear wheel bearing on a 7 1/4 rear?

not sure if bearing is same but I would think it should be. first of all check were the bearing rides if its scored at all change the axle to. get a new axle seal for sure they are cheap
to put the bearing in just start it with a block of wood if you don't have proper driver and tap it in
then tap seal in with a similar sized socket so it don't damage it. dab some grease on the seal area of axle and put it back together. hope that helps.