Correct DTM4192. . . to tell the difference just look at the rear end

even the 66 malibu tails..were similiar ~
Edit: . . . some one else answered. . . .

Big Block Malibu/Chevelle
actually 1965 but only 200 coupes and 1 vert were made
Via Option Package Z16...
1966 it became easier to get the big block
aka SS396. . . !