If you look closely you can see the adapters are different o.d on eitjer side as 8.8 tubes are not .250 wall as a lot say they are. No biggie. Also, the exsisting axle tubes will get drilled in 4 spots as well as the new axle tubes so not only will i weld the seam, but plug weld the holes. Ill plug weld first to help aid with distortion, hopefully holding tubes straight. I am using a jig to insure housing ends are inline with carrier bearing centers but, that will not stop distortion.