If you have a '70 you can swap to 71-72 axles and drums. The 67-69 housings are narrower. Best bet is to buy a 71-72 complete assembly and swap it in. If you have big back tires and custom offset wheels, it may be best to buy some drums and aftermarket axles for your housing.
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44 Willys MB
52 M38A1
64 Corvette Coupe
68 Camaro 'vert LT1 & TH700
69 Z/28 355 12.6's @110
69 Chevy Short Step 4 1/2"/7" drop
72 Jimmy 4WD 4spd 4" & 35's
02 GMC 2500HD 4x4 Duramax
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