Yes shackle goes through the rail. A tube is typically welded in the framerail holes the tube is sized to take the shackle bushings, and the shackle is bolted together around the framerail. Somebody did the hacktastic minitub mod. Front seems ok, but i bet they were going for the gold with a stinkbug stance by welding the shackle tubes to some U channel welded to the frame.
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