Here is how I know it.

Only High Perf Model&Engine determined a Scat Pack car.

For '70 the Scat Pack cars were specific high-perf: Chally R/T, Charger R/T, Super Bee, Swinger 340 and Coronet R/T having standard engines of (340-4, 383-4, 440-4, 440-6, 426) 340-6 added later in year.

For '71 Scat Pack cars were: Charger R/T, Super Bee, Chally R/T and Demon 340 having standard engines of (340-4, 383-4, 440-4, 440-6, 426).

All Scat Pack cars came with the Scat Bee qtr window stickers and were only the high-perf model (ex: R/T's). Many non-Scat cars were built with or dealer added the high-perf goodies as options but they should not have Window Bees.

For '69, I understood that there were not any Scat window bees.

Cool things never die as I see guys putting them on their new Chally R/Ts.