twinkies have fully colour coded bumpers, colour coded door strips, the phat horizontal luvred front grille, and the of course there is the dash.
not all twinkies have fully colour coded bumpers and door strips.. i got an 86 model.. well they did look like the bumpers, like the one in the pic... black in the middle, and strips on the doors...
yeah, you can tell by dash, and see if there's a rear hatch spoiler also...