NEED HELP finding a lower radiator hose 318 1972 dart

Sounds like you may have a 6 cyl. radiator as they were 1 1/2" on both ends. The 318 uses a hose that is 1 3/4" on both ends. You can get a flex hose at any part store that is 1 1/2" x 1 3/4", you just need to tell them the length. If you post the radiator number I can tell you what it came out of.