If you have a pre-CBS Fender I woudn't change a thing. (But if you do, keep the old neck). Don't be too surprised if the tone changes (for the worse) after swapping the neck due to the increased scale length. The Duo-Sonic's 3/4 scale is a perfect match for those original pickups. ....very sweet sounding.
Good advice. I’m definitely keeping the old neck! I’ll try the change simply because the original neck is a bit difficult to play because its so small. But if the change creates a bad tone change I’ll go back to the original neck and adjust my playoing style. Thanks!