I run the Hellwig on my ‘74 Duster. When I was running the stock ‘73+ tabbed LCA’s I ran the Hellwig provided links at the supplied length, no issues.
When I went to the QA1 LCA’s I had to shorten the end links. This is just because of the lower height profile of the QA1 LCA’s, that sway bar tab is not in the same place in the vertical plane as the factory LCA’s.
Of course QA1 will straight tell you that their LCA’s only fit with their sway bar, which isn’t right at all. It just requires modifying the end link length.
