I should havethe 39 half ton pieces, but am not sure what exactly you are talking about. Incidentally, while the 38 and 39 side hood pieces can be made to work by putting the 39 locating bracket on the 38 pieces and vice versa, the hood sides differ in that the 38 side bars are 4 sided, mimicking the grille bars, the 39 side bars are semi round, mimicking the 39 grille bars. Working on a 38 3/4 ton with a 39 half ton as a parts car, I have found numerous small changes between the two. Good luck!