Are the front header panels on Malibus from '78-'81 all the same? Are there any differences in the mounting points for the grill? I purchased a reproduction 1981 Malibu grill and headlight bezels a few years ago, and I wanted to install them in my 1980 Malibu, but the screw holes in the repro grill don't line up with the existing mounting holes in the 1980 header for the 1980 grill that's in the car now. The screw holes in the headlight bezels are alot closer, but still not perfect. I suspect that the repro '81 grill might be some kind of cheap offshore knockoff. Anyone else ever had a situation like this? Thanks in advance.