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So the 66-72 small bolt 8 3/4 has a width of 57 1/8" The same housing with big bolt pattern axles has a width of 57 13/16" Now the 73 and up big bolt 8.25/7.25 axle has a 56 3/4” width. So the difference between big bolt pattern 8 3/4's is 1 1/16" From my measurements the 8.25/7.25 width is...