Originally Posted by 202dy
Not easy for those with a technical inclination. Impossible for those who do not possess at least intermediate guitar repair skills.
In any event, the finished project will look terrible owing to a huge gap between the end of the neck and the body or a very oddly placed bridge.
The trick is - you need to maintain the scale length as the frets are fixed along that length. Assuming both necks are the same shape at the heel (or very similar) - you have to get it to match... The dean has 24 frets, the charvel 21 - with a slight overlap of the fingerboard (on ebay, rightmost pic)...
Due to the fret disparity (and assuming similar scale lengths) I would assume the charvel neck would be too short to fit the dean body - It's like an explorer, I picture the heel of the charvel neck ending just before the 21st fret.
Look at where the 21st fret is on the dean - It may have a huge overlap - but I'd say the dean neck is likely longer by 10 - 40 mm.
You'd need to have them to hand to be sure, but I'd guess no dice. Fretless? sure... but fretted means you have few options. That 12th fret has to fall in the middle of the string!
EDIT: The other way around might be possible (a little pocket routing on the jackson body)... but that's not what you asked.