If you have the ‘67 K frame (or ‘68-72 for that matter) and you have QA1 LCA’s your only option is the Hotchkis sway bar for a 68-72 car.
The QA1 LCA’s have a sway bar tab position that’s basically the same as the OE 73+ sway bar tab location on the factory LCA’s. That make them incompatible with all the 67-72 sway bars that use the stock sway bar end link location. But you can’t use a 73+ sway bar with the 67-72 K frame because they don’t have the provision to pass the sway bar through the K like 73+ does.
The Hotchkis 67-72 sway bar though doesn’t use the factory 68-72 end link location. It basically uses the 73+ location. So you can use the Hotchkis 67-72 sway bar with the QA1 LCA’s. You will probably have to shorten the end links for the sway bar, but the tab location is compatible.
As far as I know, the QA1 sway bar only works with the QA1 K member, so that’s not an option with a stock K frame.