No we checked before we swapped them. The distance between the perches are the same between the two rears. The Dana was not original to the 62 polara. The car was raced by the owner my dad bought it from. As for the 8 3/4 that was not original from the 67 GTX. The only reason my dad swapped them because the 67 GTX came originally with a Dana. My dad knows that because he bought the 67 GTX new.
