Differential narrowing in/near Los Angeles 8.75 to A-body size shops needed

One more thing I can add. If you have a duster/ demon with the open wheel wells (not covered like dart / scamp), and you have the 68-69 B body rear I would consider using it at its current width.

I think I have quite a bit of room between the fenders and the wheels on my scamp but the tires are pretty tight against the springs and thats using the dr diff offset spring kit. Maybe pick your wheel/ tire combo before you shorten your axle and decide if you need the offset spring kit.