They are very close, flange to flange, perch to perch 1/2 in or so. please help Thank You.I have a rear end out of a 75 charger,want to install it in a 67 dart. Will it work,What do i need to change.?Spring perch locating needs to match to bolt into your Dart springs. The perches can be cut off and moved on the tubes. Critical measurements are the axle flange to axle flange so tire/wheels fit under the fenders. MOPAR performance makes replacement spring perches and offset springs to fit various rear ends into different body styles. Check them out on line or at some of the performance shops on line like Summit Racing or Jegs performance.I have a rear end out of a 75 charger,want to install it in a 67 dart. Will it work,What do i need to change.?Check with a local wrecking yard. They have an 'interchange manual' that will list what's compatible with your car. You might be able to find it on-line too.
If everything measures up the same, check the size of the u-joints. you can get special adapter-style u-joints that have two different sized bearings if the yokes are different. Pay close attention to brake connections %26amp; cables too.
Good luck!
