Mine had a front sway bar so I just replaced the endlinks and bushings. Their's I just did last week with their 5504 (?) rear anti sway bar. My truck is about 8" dump in the rear so the first attempt created a bad angle for the end links with their supplied endlink bar which was 7" as I remember, so I bought a 6" endlink bolt, shortened the spacer tube accordingly and it was still a bad angle so I went to a 5" bolt and shortened the spacer tube to 1.5". That appears to be OK and its as short as you/I could go.
See photos, hope this helps
Bobby V
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