I just got my 3" dropped axle from Sid (droppedaxles.com) installed this week. A 4" drop with the 15' wheels I have would have put it below the scrub line. If your handy in the shop you can install your own kingpins and bushings. I also flipped my tie rods using new non-tapered ends I bought from Chev's of the 40's. The old balls are a bear to get out but there's some tech tips on that process here on the forums.
