So instead of swapping my rear diff to a 4.10 from the 3.42, I'm thinking of getting a new axle with a 4.10 gear ratio installed already. My reasoning for thinking about doing this is because I'm not sure how well I would do with lining the 4.10 up where it needs to be and with a new rear axle I would just have to drop the old one and put the new one in. Is there anything that I should look out for or any manufacturing differences between axles? I'm mainly asking for mounting purposes.
If there anything I should know or reasons why it would be better to just the rear diff, please let me know. It's going to be awhile before I start on it so I wanna get some different opinions and see if there's anything I didn't think about