Although I think most of us would not recommend a spool or welded front end you can do it. It should be used only for off road. You won't get good directional stability.
Even off road there could be times when you are going along a slippery side hill that the front end will want to slide sideways. You can have these same problems (but to a lesser degree) with a locker. At least a locker can unlock for some differential action.
Don't use it on the street. Now if you do encounter a big snow drift you can put it in 4x4, get out, lock the hubs and then get through the drift. Then you should put it right back in 4x2 and unlock the hubs. That should be the extent of street driving with a spool or welded front end. If you try driving in 4x4 with a few inches of snow you may find yourself in the wrong lane or over the curb when you try to round a corner.
The choice is yours. All I'm saying is to be careful if you go ahead with this.