If that were the case, then how would HO cars be authenticated? There are specific block codes, camshafts, carburetors, standard and optional axle selections, standard and optional transmissions. If these are missing, no authentication could be made and just about anything could be tagged an HO and command top dollar.
Sprint cars are authenticated in the same manner. Block codes, heads, intake and exhaust manifolds, camshafts are unique. Same with Ram Air.
Vikki 1969 Goldenrod Yellow / black 400 convertible numbers matching