Is/was there ever a 340 Magnum

Again...

70-74 HP Challengers had badges that said "Four Barrel"- 440, 383, 340, 360.

71-74 HP Chargers had badges that were the same style but larger and said "Magnum"- 440, 383, 340, 360.

Super easy to prove.

I also misspoke when I said 340 Darts, Demons and Dart Sports had Magnum badges.

AFAIK they only had "340" badges.