So, to make a long story long, back when I thought I was going to restore my grandfather's wagon, the rear bumper was completely rusted out. I actually had to cut it off, and even before I did that I knew I needed a new bumper. I bought an aluminum one from a 79/80. It will fit my car (both are 76's), but I need to cut the plastic bumper filler piece. I don't mind doing this as I have an extra one from my grandfather's car, but it is not as sturdy as the steel and chrome one from the '76. I like the look better and the fact that it weighs less, altho the front will stay the same. Is it safe to use the lightweight aluminum bumpers, or should I go back with the original 76? I'm not worried about it being completely stock, more so on safety and that they are lighter and may also shift more weight up front.