Converting Eaton H052/72 from 8 lugs to 5

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There’s no such thing as a 71-72 14 bolt. They were introduced in ‘73. Even if that axle did exist, you’d be in the same exact situation as you are with the HO52 because they are both full floaters. (Assuming we are talking 10.5” 14 bolts here) What the guys are saying is to swap in a 1/2 ton 12 bolt 2wd rear to match your front 5 lug pattern.