Ok, so i just got off the phone with a guy thats parting out a 73. It was a 351 C. car. Along with front disc brakes, it also has a complete 9 inch rear and third member. The data plate on the car has axle code "O" which if its still original has 3.0 Locker. Now the 73 rear is one inch longer then the 67 per side. 2 inch total. Can that be modified, or is it not worth it? If i put it in like that would it be functional or look bad? I guess i could change the backspacing of the wheels. Any input would be great.