1965 Dart or Valiant Early A Body 7-1/4 Sure Grip Differential

I am restoring a 1965 Dodge Dart GT. I bought a 1965 Plymouth Valiant Signet with a Commando engine and the Valiant has a 7-1/4 Sure Grip which I am considering installing in the 65 Dart behind a 273 HiPo with a 904 transmission. The 7-1/4 S.G. differential from the 1965 Valiant has not been run for over 25 years, and I would think/or for sure, it should, at least, be looked over. I am thinking pinion bearing and seal along with axle bearings, seals, and....will I need new adjusters with the new style bearings? Any advice would be appreciated. I would like to keep the car as original as it would have been from the factory; therefore, the 7-1/4 versus the 8-1/4 or 8-3/4. Thanks for the help. Old Dart 66.