New to site AND Dodge

I'm older now and have wanted a Mopar muscle car since a teenager. I am interested in something restored--like a Scamp or Duster. Could someone please tell me what model year started with 3 point seatbelts in Dodge vehicles. While I realize the cars of this era (70s) are not as safe as contemporary cars, I'd feel a little better with more than a lapbelt. Thanks much.