Heck, in that case it's not a big deal; change the grilles & rear lamps and trunk lid trim, and most folks at the track wouldn't know it's a '67, including Tech.
The more important stuff is how suitable the car is for the drags.
My car in the avatar was run as a '71 during its professional career, but it's actually a '70.
The Hamburger/Bachelder/Chipman Demon was originally a Duster.
There are several cars like that in current Stock, SS, nostalgia, and stock-appearing-musclecar classes, all makes.