my brother in law has a 1970 mach with a dso of 89 and the car is slightly different from other machs. the stripe on the hood where it should say 428 is blacked out and it has an aluminum intake manifold and 1969 valve covers. on the invoice it says it was sold to an engineering group as part of the ford moter co on 08/69 what does transportation services mean? is this a promo car?