J54 Sport Hoods.....any info

Looking for a '71 Demon or Duster. In my search I've found some really cool cars with cool options. My question is how many of these cars really came with the J54 sport hood option? I know there are no hard % numbers, but maybe a round about estimate?

Of all the cars I have found I don't recall any being coded for the J54. I know it's aoption that is added quite often though.

38.8% of US-spec 1971 Demons had that hood.

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38.8% of US-spec 1971 Demons had that hood. [/quote where did you find that info?

I got it from a Galen Govier production figure list.