71-74 8.75 b body rear

thanks for chipen in dare devil some people dont seem to read it right.... it is a 71-74 rear wich means its a couple inches wider and the perches are 43.7 apart i have a print out of axle dimensions and i measured mine 3-4 times already to c what i got... most people do length measurements wrong too... ur supose to measure flange to flange