I recently purchased a 1984 t-top grand national, but now i'm not certain if its a real grand national or a t-type. Its my first turbo buick (my dream car) so i dont know much about this cars...yet. It does have the Lear Siegler interior but i recently discovered that it was also an option for t-types in 1984. I tried decoding the vin but i believe that all grand nationals in 84 the vin reads as t-types..true? The paint is black but it some parts where the paint has began to peal it shows signs of red. I am not sure if it was painted red at one point or it came red originally from the manufacture. Are they any other ways to find out if its a T-type or GN??...Any help would be appreciated