7 1/4 R&P swap

Searching old posts doesn’t answer my question. Will 7 1/4 Ring and pinion sets swap between early, (1963-1972) and late (1973-76)? If so, are there any “gotchas” to worry about? My ‘66 Dart AT has 2.76 and is a slug. My ‘63 Dart wagon three/tree SBP is just perfect with 3.23. Hoping to put 3.23 gears in the ‘66 that has a ‘73 LBP differential.

Jerry in Denver