What engine for my Wife's 70 dart

i have a 70 dart custom and it came with a 318 with an auto from the factory but its gone. i am thinking about building this car for my wife and would like to stick with a 318.
my question is, what year span 318s will work in this car. i would like to simply drop one in without any worries about changing stuff. besides the obvious, same year as mine but different car, like a 318 out of a coronet, what else will work?



Luke

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