[BLAZERMAN]

Your 1970 has a 1 year only front axle. It's the first year for open knuckle and the last year for drum brakes. This makes for a very easy swap using factory parts from a 71 up 1/2 ton axle. All you should need are the spindles, caliper brackets, calipers and wheel hubs. As far as a booster I prefer to use one from a 3/4 ton along with the prop valve, you'll have to bend up some new lines but its a pretty easy job and well worth the results.
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