That stocker will help more than you realize especially on a 77 or 78 but I too am toying with the idea of shaving the back of my 77..or maybe going with a 240 rear bumper..no front just the same type of air dam I had on my 78...but I was "tapped" a few years ago in the rear..and truthfully that baby was stiff..kept my car from being damaged more than it was...darned things sure do look good with the bumpers off , spoiler and shaved.