Those are not the bars these are the 1971 version of the bars.
http://s172.photobucket.com/user/bus...hi25l.jpg.html
The 2015 bars are in a box in the Lakewood Catalog they are not the leaf spring traction bars to the left.
The 2015 bars are attached with heim joints at all mounting points allowing full adjustment just like may of the adjustable setups today.