The easiest way for them to do it would be to bend the backbone down and stretch it a bit to increase the rake angle. If they do they they would increase the length of the downtubes as well to match the backbone. They wouldn't be able to cut and rake just the neck due to the fact that the SM and BA necks are cast. They would have to cut out the cast neck and weld in a new neck. Then you might run into legal issues being the the VIN is imprinted on the stock neck. You might have to reregister the bike as special contruction.
What rake are you looking at going to? Any longer then 38 degrees you may have to extend the front end. You would have to run aftermarket extended tubes. If you do that, you'll have to change your wheel, tire and brake setup as well.
Good luck with your new endevour. Keep us posted with pics and updates.
Fryguy.
