I have installed an earlier American Deluxe neck that had the 22 fret neck. Fender changed these to the 21 fret neck 2-3 years ago. The 22 fret neck, did not have fretboard overhang and it needs the bridge moved about 1 inch. I think the newer 21 fret neck has some fretboard overhang but I'm not sure. If so, it may be an easier installation.
McD Custom Guitars
San Antonio, Texas