every state is different, check yours before you make a decision.
Bunch-o-choices
Chop yours- the title will remain as is.
If you get aftermarket, you may have to get a "built" title or just use your own and keep your frame at home.
Get a pre-number frame and chop it - use your title or built title
get after market- graft your numbered neck on keep your title
get aftermarket- stamp your numbers on it and keep your original frame (hidden)
it's not against the law to restamp numbers- it's only illegal to alter them
Although sometimes it takes a judge and a couple of lawyers to decide