1974 Dart Swinger

that is a great score! there will be a wealth of parts there for you to use. all of the a/c stuff will interchange, but will be a big undertakeing. the a/c may require some help but again can be done. the larger radiator and fan is do to the a/c so that is a plus. even if you don't use the a/c at least transplant the radiator, fan ,and shroud to yours. seats i would think would be the same as a 2 door. power brakes will transplant to yours. you will need all brackets, booster, m/c and pedal rod, portion valve too. the exhaust system may not fit as the wheel base on the 4 door is going to be a bit longer than the 2 door. some slight modifaction will be needed. dash will work but is also a tediouse job. take your time here. looks like you have your work cut out for you now, so get busy!