An accurate 8 3/4" rear axle width list

72bluNblu said
The chart I posted has additional measurements compared to the one at Moparts, yes. I have measurements for the 7.25 and 8.25" A body and the 8.25" F-body rear axles because I was able to measure them myself. But I haven't edited the chart that I originally posted in this thread. I've confirmed a few more measurements myself since I posted it, but I don't have any more additions.
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According to the chart axle length for a body 8 3/4" is 27 11/16" and housing length is 52 5/8". Why is the drum to drum measurement different between the bbp 57 13/16" and sbp 57 1/8"? I'm assuming that the drum measurement is taken where the wheel contacts the drum but the chart doesn't say. Thank you.