Savage lists 6 target actions:

Std Right Bolt, Right Port
223 Right Bolt, Right Port

Std Right Bolt, Left Port
223 Right Bolt, Left Port

Std Right Bolt, Dual Port
223 Right Bolt, Dual Port

Are all of these large shank? Are the only difference between the 223 bolt head action and the std bolt head action...the bolt head itself? Are they all the same action length, bolt and shank size?

Could I convert a 223 dual port to a std caliber dual port by just changing to a standard caliber bolt head?

Are all the Target Actions large shank regardless of the bolt head being 223 or std cal?