Brake line

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There were no loops on my 70 Dart with power brakes, however the lines were not straight to the MC allowing some flex. When I shifted to manual I wound up coiling the extra brake line to make it fit. Makes me wonder if Mopar used the same length of line for both and bent it depending on if it was manual or power brakes?

How do you know the lines were OEM?
They did it so the lines would not eventually crack.