i picked up some comlete yj axles, driveshafts and steering box/ linkages for $100 this weekend. its a d30 and a d35. i know the 35 is junk but its for my dd comanche with 31's (which currently has a d35). the axles have 4:10 gears so i was hoping that in addition to having spare shafts (they are compatible right? the fronts looked a bit different but they are both CAD axles) i would like to swap the gears. i know its not recomended to swap used gears so what are my other options? i think the rear axle may bolt up since both are SUA but what about the front? it would be a lot of fabbing to swap it in... is the main issue with swapping used gears just the noise? i could live with that...