The linkage rods are the same length for the slant and V8’s. Don’t cut them. As you showed in the 1st photo, and are pointing to from the manual, you have the upper rod.
Was talking about the Z bar tube length, where 3/4 to an 1 inch could be removed from a /6 Z bar to “make” a V8 Z bar. The slant z bar is like 7 inches and the V8 is like 6 inch. It’s been a while since I measured them…