... Eh?
Maybe I should have made that clearer: to get proper intonation with a Jazzmaster you need 25.5 inches between the nut and the bridge. With a Jaguar you need 24. This isn't to say the neck itself is a full inch and a half longer, that's just how it adds up including the bridge distance from the neck pocket. If you put a Jaguar and Jazzmaster body side by side, the bridge is closer to the neck pocket. So if you just swapped the neck like you apparently want to do, it won't work, and the guitar won't intonate. Them's the facts, it will not work without routing and filling to move the bridge. At that point you might as well just put Jaguar pickups in a Jazzmaster.
