Question on 1970-71 Z/28s

[442w30]

I stumbled upon a post in another forum and it was a "new one" for me.

Guy was claiming this:

1970, and I believe '71, Z28s had the gas pedal hinge on the floor, all other trims had the gas pedal hanging from under the dash. Not something people usually change if they are going to make a Z28 clone.

If the gas pedal hinge is on the floor, it likely was an original Z28.

I know 1st-gen cars have certain codes on the data plate that can help determine whether it's a Z, but not sure about 2nd-gen Zs – I'm guessing docs are the only way (and certainly not a pedal)?

Thanks!