i found my body plate for my 1980 olds and i looked it up and found most of the definitions but not all the numbers and letters are as follows 80 09b 3ar47 r 017979 79e 19L 19T L ar9 c04 084167 this is how the plate looks, i got everything figured out except19t, L, and co4, and 084167. can any one help with this?