74 duster 360 production #s

In '76 it would have just been [a Duster or Dart Sport] with a 360 installed. Also you could have gotten a 360 in any a-body that year, correct me if I'm wrong.

You're right ; almost 100% spot-on .
The 360 was available in the Dart Sport (LL29) , Duster (VL29 / VH29) , and the "A38" Valiant (VL41) and Dart (LL41) .

It was rated at 220 hp ; TorqueFlite only ; NO catalytic converters (!!).
While this combo was available in Ca , it was straddled with a single exhaust and a catalytic converter ; its rating was 195 hp.
Thanks to **** *** Jerry Brown (yes , the same asshole that's been voted back into office by people with short memory spans ...) , even police cars had to meet emissions standards . This explains the emasculation of the 360 package in Ca.

Prior to Brown's ruination of California , police cars were exempt from Ca's ridiculous smog equipment and inspections (which have been proven as a 100% money grab).
The CHP used to order special cam grinds for their vehicles prior to Brown the *** Clown's liberal leadfist .

But , I divulge ...

Yes , the Dart Sport 360 (LM29L) Duster 360 (VS29L) models , as separate entities , disappeared ; however , as you've surmised , a 360 could be had in *virtually* any 1976 A Body ( no known Scamp nor Swinger models with a factory 360) .