Mopar Posi rear axle

I had a friend telling about a car that had Posi in First AND Second.
Posi irks me a little, but there are Mopar owners that buy them because they like them, not so much to wrench. They don't bother me as much as the the ones whose uncle had a Charger with a 440 Hemi Iron Duke with a Posi and a rock crusher 4 speed etc, etc. Basically the biggest baddest coolest sounding buzzwords all rolled into the same car