Scammer Alert: calebgrandpa56

I think it's impossible to find, because they were mandated in 73. I don't think there are any non shock numbers for 73 and up. I could be wrong.
They were mandated in 74. I have done tons of research. When the model year 1974 started, it was actually a guessing game if you car had them or not. My car has mounting provisions for both non-shock and shock mounted bumpers.