MJ's 71 Beaver (Dart)

ACME SS said

Apparently these cars came with a front sway bar when equipped with a V-8 (someone may correct me but that was my take on it).

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Correct me if I'm wrong, but my '71 slant-six Demon has a front sway bar. Was it an option? Maybe standard with front disc brakes?
(sorry, no better pic)