Alternator/Starter 440 Swap?
If you mean using the /6 starter/ alternator on the 440, they will fit. All starters fit all "traditional" engines (pre magnum, etc) except hemi and some big truck and industrial.
All alternators (*except) should interchange, except for the break at 69/70 when they went from a grounded brush to isolated field, INCORRECTLY called "dual field."
*The big frame 105 amp units I THINK needed special brackets, but I doubt you are referring to them: