What SWAY BAR to choose

I’m not an expert but I believe that complicates things since you appear to have 73-76 lcas with the tabs in place for the 73-76 bars as well as front mount calipers.

It does complicate things, but it just means you can't use the stock 67-72 sway bars. There are other options, like the Hotchkis.
I'm in the same situation. Biscuit mount K member with 73-76 control arms. I asked Helwig and they recommended the #5904 for my Duster.
#5904 is a B/E body sway bar. I would definitely want to measure one before I tried it for that application.

Just pointing out an option. Hellwig doesn’t have a bar that uses the later LCA tabs, but Hotchkis does. Yours and the other comment sounded like you didn’t think there was an option at all.
I think the Hotchkis is the only one that will bolt up to the 73-76 LCA's on a 67-72 K frame.

Looking at where the Hellwig 55917 mounts, it appears that it put the end links outside the strut rod mounts still. The 73-76 sway bar tabs are on the inside of the strut rods, so the #55917 probably wouldn't work with the factory 73-76 tabs.