67 Barracuda Sway Bars
I have Helwig bars both front and rear on both my cars . My 68 Fastback is set up just like yours with 4 wheels discs . The fronts are later model discs and lower control arms without tabs. I used the brackets supplied by Helwig but would prefer to weld news ones on.
I will try to round up some good pics . Of course since I live about 5 miles away you could always stop by and check them out .
The rears I welded the brackets to the housing to eliminate the Ubolts.