Not sure where you are, but here in the Bay area in CA, it was 700 for the guy to completely swap out the 3.73s that came with my Scout axles for 4.10s. As he did that he took the limited slip from the rear scout axle and put it in the front, and put a new detroit
locker in the rear. I had to pay more for all the parts, used rubicon dana 44 gears, 100 per set, plus the
locker 560.00,and bearing kits, seals etc, about 1000 in parts all together.
If I had completely disassembled everything, he would have done the rings and pinions, locker, and limited slip install only for 400. I would have had to take empty axle tubes to him and all the parts, and then pick it up to put the rest back together. I had this guy installing the axles in my jeep anyway, so i let him do all of it. In the process, I ended up with very bad
caster -3 degrees. That is another story, which people here (JEEPZ) helped me figure out.
As it turns out I still have the narrow track 3.54 axles for my jeep, I don't know where you are, but I had bought a detroit locker used for that front dana 30. I paid 200.00 and would sell it for the same if you are interested. It is only good for the taller(low numbered) gear ratios. I think 3.54 is the highest number or lowest gear ratio you can go with it. A detroit locker is a little weird to drive on the street, but in the front, you wouldn't have the hubs locked on the street anyway.
I also have a limited slip diff that appears to be a dana(amc)20 that was in a box in the back of my jeep when I got it, if you are interested in any of this, or a 3.73 limited slip '75 CJ5 dana 44 complete rear axle(narrow also), e-mail me,
frankbg68@gmail.com
Sorry,Not really trying to sell you my stuff, I was going to put an ad on craig's list locally for all those parts after I am finished with my house move stuff, but It sounds like you might need something like that locker. Maybe someone else here can verify the different ratios the carriers are good for, I thought on the 30 axle it was 2.?? to 3.54 and 3.73 to 5.??. I understood that the carriers on the dana 44 are 2.?? to 3.73 and 3.92 to 5.30 or so.For the 44, they have thicker ring gear sets to use the lower gears in the 2something to 3.73 carrier, which is what I got, thicker 4.10 gears, to go into the 3.73 carrier. If anyone has some other info, please jump in.