Greenboy,
I'd be wary of changing the body. While you think the tone lies within the neck, there is something to be said for body-neck mojo, especially with a bolt-on.
If you're satisfied with the tone, keep the body intact. Cosmetics be damned. As for an extended horn, you might be better off moving the bottom strap button up a bit. Worked wonders for my Warwick Thumb.