1980 was a major change over year, the front axle went from passenger side diff to driver side. Automatic went from turbo 400 to 727. Transfer case went from Borg Warner to new process.

The 300 is a no go, unless you swap front axle too.

There's several np cases that will swap with driveshaft mods. 208 is the easiest since it was offered originally. Could also be possible to use the 231 and 241.

What's wrong with your 219?