Parking brake light? Emergency flashers? Standard in 66?

abgwin said
Reading through the owner's manual on my 66 Barracuda, they show both a parking brake warning light and emergency flashers as standard equipment.

I have neither in place. Were they optional?

Anyone have a picture of them installed to share?

Thanks in advance.
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My information shows emergency flashers as a mandatory option for cars sold in NY in 1966. Never heard of a parking brake light for the early A-bodies as standard equipment or an available option.