Rear axle codes and help

[70 c10 rook]

So I'm converting my 70 from 6 to 5, and I have this code on the rear axle TDE 0522K that is on the pass. Axle tube on the pass. Side yolk I have 3896838 and on the driver side yolk there is GM10. I have done some reader has and found out that most likely has 3.07 gears. Are these any good will they get up some speed I'm going to keep my 350 4 barrel pretty much stock. Can anyone give me some input on this I will eventually have 18x8 and 18x 10 tires and wheels. Thanks for your help