722.3 is a 4 speed auto

722.4 is similar looking 4 speed but smaller than the 722.3

722.5 is a 722.3 with a built in overdrive unit at the end.

Near as I can tell none are a direct bolt in with each other and may require drive shaft mods.

The xx at the end is a variation code, that is sometimes shift points / pressures / number of clutch packs not sure what will interchange as there are too many.

Have a look at car-part.com and sniff around for interchanges, the info isn't 100% ( sometimes you can go one way and not the other , sometimes they don't list parts that will interchange. ) but will give you a pretty good idea what will work.