magnum head question

I need to ask a question that has probably been asked a bunch of times but i am not good at looking through old posts so i apoligize ahead of time for asking a question that may have been asked before. I was just given an older 318 magnum i was told out of a 94 anyway i dont want to use the bottom end just the top end am i going to want to use the 318 heads or are the 360 magnum heads different or better to use i have a 360 la in my 72 dart and was thinking about putting these heads on that but needed to know if the 318 heads were the way to go or if i should look for 360 heads thanks for the help Justin