My 73 340 Rally Charger had "340 MAGNUM" badges on each side of the power bulge hood. So yeah, there was a 340 Magnum. This car was all original when I got it, except for front fenders, bumper and valance. We repaired it after the guy I got it from ran it into a brick mailbox and then a brick wall. The hood is original to the car and you can clearly see the "340 MAGNUM" callout emblem. Here's a picture.
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