It's been my experience that the ball joint will pop loose with a few well placed shots on the spindle with a hammer after you've loosened the ball joint nut... pickle fork can damage the grease boot, so I would try the hammer first, then the pickle fork if it won't budge.
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'72 short step, 350, 700R4, tilt, ps, pdb, a/c, lowered coils, etc., other work in progress... San Diego, CA
http://www.ixpres.com/vlusardi/chevtrk.htm
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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