Here is an adapter listed as for B Body, but believe they fit A Body too.
One guy has them listed as A, B, & E bodies. This will get you started, do your research. They work Great. Looks like not many left from this supplier . . better check quick.
ebay item:
323725231523
View attachment 1715303633
If you are going to get into your steering coupler to relube it, hear is a handy clip for easily getting the top back on and holding it in place. They make kits of this with the new rubber seal too, or you can buy the seal seperate.
ebay item: 291757502737
Mopar A B E Body 66-72 3" Steering Coupler Retainer Clamp STAINLESS DMT 2996935
View attachment 1715303635
Used this adapter and stainless clip on a B Body, super happy, works great.
