69 340 Swinger question

Kendog 170 said

My buddy's original 70 Duster 340/4 spd. did not have them so he put them in. I'm curious if you could also request them when ordering ?

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Good question, my guess is no, but, I am no expert by any means!! A 340 4 spd without them? This just makes me more curious as to what cars had them or not...