I am not sure if I was taught wrong from the start or if Pathfinder is different. Is converting a spell to a cure spell a standard action or a full round action? Feel free to call me dumb as you answer.
It is not really an action. The action is casting a cure spell. Clerics are able to power this spell by using a level equivalent non-domain spell slot that contained a different spell.
If you want to look at this as a spell conversion then I would treat it as a free action.