Barracuda rocker gills and spears??????

So are the "gills" the pieces mounted just forward of the rear wheel opening? Hard to see from the pic but I'm assuming it is a seperate piece from the longer "spear" that runs the length of the rocker. Is that correct?

My 67 has also has holes forward of the wheel opening, am I correct in assuming that the "spear" on a 67 went from wheel opening to wheel opening?

thx
Steve