No more than surface now days through vin/body swaps. These don't have the stamped vins that are original, they will be registered as kit cars in the year they most closely resemble, and there are enough registries/watchdogs out there to dispute a sudden increase in primo units that show up.
While $15-17k seems like a steep number up front, you have to figure it will cost about that much to take a $2000 basket case to like condition, so why not start with a a good body to begin with.