Any state that would select Cruz over Clinton would also select Trump over Clinton (except maybe Utah), so I don't see what difference this could possibly make.
Maybe if you "nominated" Kasich in Ohio, Collins in Maine, Ayotte in New Hampshire, Sandoval in Nevada, etc., you could keep Hillary under 270.
The point of this is to throw some states from Trump to whoever so that no one gets to 270, and the House can pick the real conservative.
This would require a majority of members from a majority of states to go along, which might be difficult to achieve if there is a substantial
trumpista faction in the House.