Slant 6 k frame

Um, what year A body are we talking about?
'66 and earlier used the same K frame regardless of engine, '67-'72 had a biscuit type mount K frame that is easy to adapt to, and '73-76 had a spool type K that is a little more involved to work with. There are no V8 K to slant 6 adapters that I am aware of.