I made a comment on IG, but I thought I'd elaborate here. I saw you're swapping in a 41 rear with 4.11s. Unless you really want the 4.11s, you can keep your 3.78s. you can rob a bell and axle off the donor rear, or you can swap the entire center section and ring gear to the new rear end. It's a little more work, but those 4.11s will be fun off the light, but slow on any freeway. The hard part is setting the bearing pre-load with the gaskets between the bells and the center section. It's not mentally challenging, but time consuming and it helps if you have a buddy. But I did for my first time and it's working fine. I was given a 42-48 rear end with 3.54s and I swapped the entire center section and ring gear into my 40 rear end.