Axle Swap to upgrade to a 4.5" BP

dadsbee said
Post #3 is great advise, provided your factory axle flanges aren't like my Darts...
View attachment 1715813067

Need to weld shut those 2 smaller holes on the axle flanges, machine them down flat, and then redrill for the 4.5 studs.

Leave the large hole open so you can get your socket in there so you can tighten the bearing retainer at the backing plate.