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I'd like to know more about this.
The "offset" is built into the brake supports, right? Why couldn't an 8 1/4" brake setup work? They physically fit the 8 3/4 housing. Is it a matter of the amount of axle shaft and hub that sticks out of the housing? I have mixed and matched parts here many times and it worked out fine. Maybe I got lucky?



Depending on the body platform yes , EXCEPT for small bolt pattern A bodies , the axle offset is different, it's a 1/4 LESS than everything else EXCEPT for 66-69(70 ???), B bodies with 7.25 rear and 10" brakes , they have the same offset as the small bolt A body.