1965 Dodge Dart stock differential advice

Unless you’re going for 100 point resto or true survivor status. A reversible upgrade (better rear/disc brakes) will never affect a vehicle.

As a 66 Dart 273 4bbl/4 speed owner who like to have fun with his car put the 8-3/4 in be it an original housing or Moser. My car is an original 8-3/4 car and I’m modifying it. I’ll be buying a moser house& axles (I’ll retain the original if I ever sell it goes with the car)