Looked at the swabar setup on the Demon.... It's the long style bar... ....kinda figured it would be. IF you stumble across a pic of one of those odd-ball setups, I'd like to see it.
While looking at the K-member and the way the bar is set up, I can see where a gussetted cut could probably be done in such a manner as to use the shorter bars.... I'd be kinda wary of cutting out that big a chunk on the K-member anyway.... I think I'd probaby do what you did: get an early set of tabs and weld em onto the newer LCA.