I would be looking at upper and lower control arm bushings for the source of the noise.... best way to check is to be looking at the control arms from underneath while someone bounces the front of the truck up and down....
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'72 short step, 350, 700R4, tilt, ps, pdb, a/c, lowered coils, etc., other work in progress... San Diego, CA
72 Stepside Project
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