Fordsmallblock

I am working on a 2004 f-150 heritage edition,has blown out spark plug, I have the Atd thread repair kit 5410 for the 3 valve head. I know there is a difference in the internal size of the insert for the 2 valve and 3 valve head,but the external sizes for both are identical. My question is this can I use the ream and tap from the 3 valve kit in the 2 valve head ?
Any advice on this is greately appreciated