1991.5 is midyear when the change over began from the "STP" front fender decal group to the "Goody's" front fender decal group. Also of note would be the Blisterpack back began to be changed from "Earnhardt" backs to "Petty" backs.
1991.5 is midyear when the change over began from the "STP" front fender decal group to the "Goody's" front fender decal group. Also of note would be the Blisterpack back began to be changed from "Earnhardt" backs to "Petty" backs.